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Lunar eclipse, meteor shower treat Canadians this weekend

Written By Unknown on Sabtu, 19 Oktober 2013 | 22.11

partial-lunar-eclipse

During a penumbral lunar eclipse, left, part of the moon is temporarily cloaked by the outer part of the Earth's shadow. The effect is subtle, but noticeable. (David M. F. Chapman/Royal Astronomical Society of Canada)

Two cosmic events, a penumbral lunar eclipse tonight and a meteor shower on Sunday, may make it worth your while this weekend to cast a glance at the night sky.

Starting just before 8 p.m. ET Friday, the bottom half of the full moon will be darkened by the Earth's shadow during the penumbral lunar eclipse.

The Earth's shadow has two distinct regions: A very dark, central region called the umbra, and a diffuse outer region called the penumbra.

The penumbra will cause the moon to get dimmer Friday night until about two-thirds of the moon is cloaked in shadow at 8:50 p.m. People in Eastern Canada will be able to see the entire event, but it will be well underway at moonrise for those in Central and Western Canada. This penumbral eclipse will be subtle but still noticeable to anyone who stops to take a look.

Even subtle eclipses can "help people understand that our solar system is in motion," said Colin Haig, vice-president of the Royal Astronomical Society of Canada. "It's a fairly rare event, a couple times a year at best and it happens in a matter of a few hours."

Sunday night to dawn on Monday will be the peak of the Orionid meteor shower. 

"In the darker hours, look towards [the constellation] Orion the hunter, generally in the southeast sky," says Haig, and it will appear that meteors are coming from Orion's club. 

The meteor shower will peak at 10 to 20 meteors per hour just before dawn on Monday, according to Earthsky.org. Unfortunately, the brightness of the full moon will make the meteors difficult to see for most Canadians. 

map-of-lunar-eclipse-visibility-131018

People in Eastern Canada will be able to see the entire penumbral lunar eclipse, but it will be well underway Friday night at moonrise for people in Central and Western Canada. (Fred Espenak/Royal Astronomical Society of Canada)


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Purple loosestrife's climate adaptation key to its spread

The ability to adapt to drastically different climates within a short period, like decades, is a key factor that allowed the invasive species purple loosestrife to spread so widely, a new study has found. The discovery suggests we may need to alter our strategies if we want to control these new arrivals.

Scientists had long thought that the main reason some invasive species are so successful is that they typically have no natural predators in the environments where they aren't native. This theory has been backed up by evidence from experiments comparing the rates of  reproduction of invasive species exposed to predators and those who haven't been exposed.

But biologist Rob Colautti and his colleagues have found that in the case of the invasive European plant purple loosestrife it was the plant's remarkable ability to evolve quickly to adapt to different climates that was "just as strong" as the lack of predators.

The results were published this week in Science.

Purple loosestrife is a wetland plant that was introduced to the East Coast of North America during the 19th century, likely hitching a ride in soil in the ballast water of European ships. Since then, it has spread as far south as Texas, as far north as northern Ontario and Newfoundland, and as far west as B.C.

According to the Ontario's Invading Species Awareness program, purple loosestrife is a concern because it spreads quickly and grows in dense stands, reducing nutrients and space for native plants, and degrading habitat for wildlife.

Colautti, a post-doctoral researcher at the University of British Columbia, conducted an experiment during his Ph.D. at the University of Toronto in which he transplanted loosestrife plants from Texas to Timmins, Ont., and plants from northern Ontario to northern Virginia.

Compared to the transplanted southern plants, the local loosestrife in Timmins flowered 20 days earlier. That allowed them to take advantage of the short growing season and produce 40 times as many seeds.

Similarly, when the northern Ontario plants were grown in Virginia, they produced just a 10th of the seeds that local plants produced because they flowered very early, when they were very small.

The increase in reproductive rates linked to local adaptation was comparable to that seen in the absence of natural predators.

Colautti told CBCNews in an interview that purple loosestrife has spread far and wide mostly in the past 50 years, suggesting that it evolved changes in growth and flowering patterns to adapt to different climates within just a few decades —  very, very quickly.

Multiple introductions boost evolutionary speed

He said there is some evidence that this rapid adaptation ability may be "fairly common" among invasive species, especially those that have spread over a large area.

In fact, the way such species were introduced to North America from other continents may have helped them gain their unusual evolutionary speed. Similar to the pattern seen in many invasive species, genetic analysis of purple loosestrife suggests it was introduced to North America multiple times from different parts of Europe and Asia, which would boost the amount of genetic variation in the North American plants.

"One prediction we might make is that species with higher genetic variation for those traits that are important for local adaptation should evolve faster and spread faster," Colautti said.

The findings of the study have a number of implications for controlling the spread of invasive species.

For one thing, Colautti said, it suggests that limiting the number of times an invasive species is introduced may help prevent it from gaining the genetic diversity needed to spread quickly.

It also suggests that strategies for controlling an invasive species should take into account different populations adapted to different climates, rather than just treating them as a single species.

For example, to control the spread of purple loosestrife, two European beetles that eat the plant's leaves were introduced to North America by the U.S. and Canadian governments in 1992.

Strategies must target distinct populations

Colautti said to maximize their effectiveness, control programs that use beetles need to ensure the insects are feasting at the right time to damage seed production for a given population of loosestrife.

"I think there might be ways to improve them by taking into accounts those differences… among populations," Colautti said.

In theory, he added, the plants' genetic diversity could even be used against them, by transplanting northern plants south and southern plants north. That would introduce "maladaptive" genes for flowering and growth rates that are "wrong" for the climate into local populations.

Another thing that the study's findings suggest is that purple loosestrife will be very resilient to climate change, and that a warmer climate could help it expand its range even further.

"As bad as some of the climate predictions are," Colautti said, "the difference between Texas and Northern Ontario is much larger than the difference from current climate to future climate."

The research was funded by the Natural Sciences and Engineering Research Council of Canada.


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Canadian downloading site isoHunt shut down, fined $110M US

A Vancouver resident has agreed to shut down his popular downloading website and pay a $110-million fine after settling a long legal fight with the Motion Picture Association of America.

Gary Fung ran isohunt.com, a search engine for BitTorrent files, which helped users find virtually every type of copyrighted material, including music, movies, computer software, ebooks and pornography.

'Sad to see my baby go.'—Gary Fung, isoHunt.com

As of Friday, the site stated it linked to 13.7 million active BitTorrent files with 51 million users either uploading or download them.

According to Alexa.com, it ranked as the 423rd top site on the web for global traffic and 167th in Canada.

On his blog, Fung said he was "sad to see my baby go."

"But I have fought the good fight, I have finished the race, and I have remained faithful. Ten-and-a-half years of isoHunt has been a long journey by any business definition, and forever in internet startup time. It started as a programming hobby in my university days that has become so, so much more," Fung wrote.

"It's been a learning experience beyond what I imagined. I've done the best I could pushing the social benefits of BitTorrent and file sharing, the searching and sharing of culture itself, but it's time for me to move on to new software ideas and projects."

MPAA, which represents Walt Disney Studios, Paramount Pictures, Sony Pictures Entertainment, 20th Century Fox, Universal Studios and Warner Bros., originally launched its legal challenge of isoHunt in 2006.

It said in a statement that the settlement was "a major step forward in realizing the enormous potential of the internet as a platform for legitimate commerce and innovation."


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Homo habilis, erectus were the same species, study suggests

Written By Unknown on Jumat, 18 Oktober 2013 | 22.11

The discovery of a 1.8-million-year-old skull of a human ancestor buried under a medieval Georgian village provides a vivid picture of early evolution and indicates our family tree may have fewer branches than some believe, scientists say.

The fossil is the most complete pre-human skull uncovered. With other partial remains previously found at the rural site, it gives researchers the earliest evidence of human ancestors moving out of Africa and spreading north to the rest of the world, according to a study published Thursday in the journal Science.

'Danny DeVito, Michael Jordan and Shaquille O'Neal are the same species.'- David Lordkipanidze, Georgia National Museum

The skull and other remains offer a glimpse of a population of pre-humans of various sizes living at the same time — something that scientists had not seen before for such an ancient era. This diversity bolsters one of two competing theories about the way our early ancestors evolved, spreading out more like a tree than a bush.

Nearly all of the previous pre-human discoveries have been fragmented bones, scattered over time and locations — like a smattering of random tweets of our evolutionary history. The findings at Dmanisi are more complete, weaving more of a short story. Before the site was found, the movement from Africa was put at about 1 million years ago.

Migration out of Africa earlier than thought

When examined with the earlier Georgian finds, the skull "shows that this special immigration out of Africa happened much earlier than we thought and a much more primitive group did it," said study lead author David Lordkipanidze, director of the Georgia National Museum. "This is important to understanding human evolution."

Early Human

This photo provided by the journal Science shows an aerial view of the Dmanisi excavation site, situated below a medieval Georgian village. A skull found there is the earliest evidence of human ancestors moving out of Africa. (The Associated Press)

For years, some scientists have said humans evolved from only one or two species, much like a tree branches out from a trunk, while others say the process was more like a bush with several offshoots that went nowhere.

Even bush-favoring scientists say these findings show one single species nearly 2 million years ago at the former Soviet republic site. But they disagree that the same conclusion can be said for bones found elsewhere, such as Africa. However, Lordkipanidze and colleagues point out that the skulls found in Georgia are different sizes but considered to be the same species. So, they reason, it's likely the various skulls found in different places and times in Africa may not be different species, but variations in one species.

To see how a species can vary, just look in the mirror, they said.

"Danny DeVito, Michael Jordan and Shaquille O'Neal are the same species," Lordkipanidze said.

The adult male skull found wasn't from our species, Homo sapiens. It was from an ancestral species — in the same genus or class called Homo — that led to modern humans. Scientists say the Dmanisi population is likely an early part of our long-lived primary ancestral species, Homo erectus.

Tim White of the University of California at Berkeley wasn't part of the study but praised it as "the first good evidence of what these expanding hominids looked like and what they were doing."

Conclusion not accepted by all

Fred Spoor at the Max Planck Institute in Germany, a competitor and proponent of a busy family tree with many species disagreed with the study's overall conclusion, but he lauded the Georgia skull discovery as critical and even beautiful.

"It really shows the process of evolution in action," he said.

Spoor said it seems to have captured a crucial point in the evolutionary process where our ancestors transitioned from Homo habilis to Homo erectus — although the study authors said that depiction is going a bit too far.

The researchers found the first part of the skull, a large jaw, below a medieval fortress in 2000. Five years later — on Lordkipanidze's 42nd birthday — they unearthed the well-preserved skull, gingerly extracted it, putting it into a cloth-lined case and popped champagne. It matched the jaw perfectly. They were probably separated when our ancestor lost a fight with a hungry carnivore, which pulled apart his skull and jaw bones, Lordkipanidze said.

The skull was from an adult male just shy of 1.5 meters with a massive jaw and big teeth, but a small brain, implying limited thinking capability, said study co-author Marcia Ponce de Leon of the University of Zurich. It also seems to be the point where legs are getting longer, for walking upright, and smaller hips, she said.                                                    

"This is a strange combination of features that we didn't know before in early Homo," Ponce de Leon said. 


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Lunar eclipse, meteor shower treat Canadians this weekend

partial-lunar-eclipse

During a partial lunar eclipse, left, part of the moon is temporarily cloaked by the Earth's shadow. The effect is subtle, but noticeable. (David M. F. Chapman/Royal Astronomical Society of Canada)

Two cosmic events, a partial lunar eclipse tonight and a meteor shower on Sunday, will make it worth your while this weekend to cast a glance at the night sky.

Starting just before 8 p.m. ET Friday, the bottom half of the full moon will be darkened by the Earth's shadow during the partial lunar eclipse.

The Earth's shadow has two distinct regions: A very dark, central region called the umbra, and a diffuse outer region called the penumbra.

The penumbra will cause the moon to get dimmer Friday night until about two-thirds of the moon is cloaked in shadow at 8:50 p.m. People in Eastern Canada will be able to see the entire event, but it will be well underway at moonrise for those in Central and Western Canada. This partial eclipse will be subtle but still noticeable to anyone who stops to take a look.

Even subtle eclipses can "help people understand that our solar system is in motion," said Colin Haig, vice-president of the Royal Astronomical Society of Canada. "It's a fairly rare event, a couple times a year at best and it happens in a matter of a few hours."

Sunday night to dawn on Monday will be the peak of the Orionid meteor shower. 

"In the darker hours, look towards [the constellation] Orion the hunter, generally in the southeast sky," says Haig, and it will appear that meteors are coming from Orion's club. 

The meteor shower will peak at 10 to 20 meteors per hour just before dawn on Monday, according to Earthsky.org. Unfortunately, the brightness of the full moon will make the meteors difficult to see for most Canadians. 

map-of-lunar-eclipse-visibility-131018

People in Eastern Canada will be able to see the entire partial lunar eclipse, but it will be well underway Friday night at moonrise for people in Central and Western Canada. (Fred Espenak/Royal Astronomical Society of Canada)


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Permanent science gap left by U.S. government shutdown

New

Climate, diseases not monitored; experiments not run over 16 days

CBC News Posted: Oct 18, 2013 10:43 AM ET Last Updated: Oct 18, 2013 10:53 AM ET

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Torah Kachur - Science shutdown 7:25

Torah Kachur - Science shutdown 7:25

Although legions of U.S. federal scientists and lab technicians were technically back to work Thursday, it was not business as usual. 

Thousands of experiments were put on ice during the shutdown, an innumerable amount of data was not collected as scheduled and millions of dollars were wasted, CBC science columnist Torah Kachur reports.

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CBC Radio science columnist Torah Kachur

The monitoring of disease outbreaks by the Centers for Disease Control, climate indicators by U.S. Antarctic research stations and asteroids by NASA are among the projects that were suspended during the shutdown, Kachur said.

"There's going to be huge amounts of data that has either slowed down significantly or [been] lost completely," she told CBC's Airplay. That means scientists "might have a gap in their understanding of how things work. You can't do trends and you can't do a whole set statistical analyses if you're missing some of your data sets."

Kachur detailed the long-term effects that the shutdown will have on the state of science not just in the U.S., but around the world, including Canada.

Comments on this story are pre-moderated. Before they appear, comments are reviewed by moderators to ensure they meet our submission guidelines. Comments are open and welcome for three days after the story is published. We reserve the right to close comments before then.

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Note: The CBC does not necessarily endorse any of the views posted. By submitting your comments, you acknowledge that CBC has the right to reproduce, broadcast and publicize those comments or any part thereof in any manner whatsoever. Please note that comments are moderated and published according to our submission guidelines.


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Google wants your face on its ads. How do you 'Like' that?

Written By Unknown on Kamis, 17 Oktober 2013 | 22.11

In the Wild West world of online advertising, Google is hoping to add a new weapon to its already formidable arsenal: your name and face.

The internet behemoth is planning to deploy names and photos of users of its Google Plus social network and reviews they've made there to pitch products to their online friends and tout the quaint little neighbourhood restaurant.

Google is offering users a way to opt out of these new "shared endorsements."

Google shared endorsement

This example from Google shows how a shared endorsement might appear in an ad. (Google)

But the plan that is expected to launch next month has already sparked a backlash, and has refocused attention on just how much control those going online have over their personal data.

​"People have a reasonable expectation that when we click 'Like' on a product, or we click 'Follow' for a brand, or we check in on Foursquare that …we understand how that information is being used," says Sidneyeve Matrix, a media professor at Queen's University in Kingston, Ont.

"To flip the script and then say we're going to use this information … in a different way is very confusing and makes consumers really uncomfortable and irate."

Under the new terms of service that kick in on Nov. 11, the name and photo a user employs in Google Plus could be included in ads that incorporate that user's endorsement of a new Thai restaurant down the street, a new deli around the corner or the latest song that user bought through the Google Play store.

Those product or service reviews, which a user has already posted somewhere on his or her Google network, could show up in ads seen by the user's friends and connections, and the broader public, when they do a Google search.

"We want to give you — and your friends and connections — the most useful information. Recommendations from people you know can really help," the company said in an explanation of the changes.

In reply, some Google Plus users have already shown their distaste for the plan by swapping out their personal photos in favour of one of Google executive chairman Eric Schmidt.

In adopting "shared endorsements," the company won't be gleaning new information from its 390 million active Google Plus users per month — it's just changing how it uses what it already has.

Less control

"Essentially people were giving this information to Google Plus all along," says Avi Goldfarb, a marketing professor in the University of Toronto's Rotman School of Management.

"What's changed now is now you don't have control over when and in what situations people see that, and so that can make some people uncomfortable."

Google's foray into broader use of names and photos is not the first such effort to create a closer, more personal link to advertising content — and ultimately to try to make more money from it.

"It's certainly not foolproof, but the research shows that we're more likely to trust something that we think has been recommended by an average consumer like ourselves," says Matrix. "The very best endorsement would be from somebody that we know," even if only loosely through some sort of social media connection.

In the case of sponsored endorsements, Google is following in the footsteps of Facebook and its use of "sponsored stories," a practice that ended up costing Facebook $20 million to settle a class action lawsuit and compensate users whose personal details were featured in advertisements without their permission.

"The public sentiment was very, very negative," says Matrix, "and so Google is using the same strategy and they know they're going to need to provide an easy opt-out for people."

Both Matrix and Goldfarb say Google's opt-out option for shared endorsements is fairly transparent and clear.

With its one box to click at the bottom of the settings page, the opt-out function "seems much more user-friendly than some of the other terms of service that we get with apps that we download," says Matrix.

But users have to take action themselves if they wish to ensure their faces don't end up fronting promotions they might not have intended for a broader audience.

And that default position, suggests Goldfarb, is what is particularly controversial about Google's latest move, the fact that "if you don't do anything, this can happen."

Default position

For people who care deeply about their privacy and are always on the lookout for ways it might be compromised, the opt-out function could easily look after their concerns.

"The people who care most passionately about their own privacy are, at some level, not at risk," says Goldfarb. "It is a very straightforward process to change."

And for some people, "shared endorsements" might be welcome.

'It's people in the middle, people who might not care strongly one way or the other, that are going to be affected.'- Avi Goldfarb

"The people who appreciate targeted and effective advertisements, to the extent there are such people, benefit by better targeted or … more noticeable and relevant messages," says Goldfarb.

"It's people in the middle, people who might not care strongly one way or the other, that are going to be affected," he says. 

While the opt-out option may offer those concerned about privacy a comfortable way out of Google's latest plan, Matrix cautions against anyone ever thinking that privacy settings offer full online protection.

Don't count on privacy settings

"Assuming that we've got our privacy settings set, and so then we're safe, is probably very ill-advised," she says.

"Google's in the courts right now and they were arguing that people don't have a reasonable expectation of privacy in our email. So I think that we can't rely on the privacy settings."

What, then, could a person concerned about privacy rely on? Matrix offers another cautionary answer.

"I think that when you're typing anything online, you can rely on the fact that it may be made public.

"When you post an image online, you can rely on the chance that it may become public and in places that … you just would never expect."

Google's proposed use of shared endorsements may have sparked controversy, but there's no sense it will be the last time an internet company seeks to find new ways to use personal information and images.

'Amazing opportunities'

"There are lots of amazing opportunities for companies to use data to better serve customers, and as we get more and more data we're going to see more and more companies take advantage of these opportunities to better serve their customers," says Goldfarb.

But with that comes a trade-off between giving people the services they want and having them remain comfortable offering up the data.

"There's this fine balance at the company level and at the regulatory level, the government level, in terms of what is the right level of privacy protection and that's an ongoing debate," says Goldfarb.

"There's lots of variation across countries and we're all still figuring it out."

With files from The Associated Press


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16 features of today's Windows 8.1 release

Long-awaited upgrade released today addresses gripes with Windows 8

The Associated Press Posted: Oct 17, 2013 8:43 AM ET Last Updated: Oct 17, 2013 9:06 AM ET

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Microsoft released its long-awaited Windows 8.1 upgrade as a free download starting today. It addresses some of the gripes people have had with Windows 8, the dramatically different operating system that attempts to bridge the divide between tablets and PCs.

Windows 8.1 still features the dual worlds that Windows 8 created when it came out last October. On one hand, it features a touch-enabled tile interface resembling what's found in tablet computers. On the other, there's the old desktop mode where the keyboard and mouse still reign. The update adds some new finger- and gesture-friendly shortcuts for touch-based apps, while restoring some respect for the desktop mode that a billion PC users have become accustomed to.

The release comes as sales of traditional desktop and laptop computers continue to decline because consumers are spending money instead on the latest smartphones and tablets. It also comes at a time of transition for Microsoft as the Redmond, Wash., company focuses on devices and services, not just software. Earlier this month, Microsoft struck a deal to acquire Nokia's phone business and patent rights for more than $7 billion. Microsoft is also searching for a new CEO to replace Steven A. Ballmer, who announced last month that he plans to retire within the next year.

The Window 8.1 update is free for current owners of Windows 8. It's available starting at 7 a.m. ET Thursday in New York, which corresponds to the start of Friday in New Zealand. Simply go to the Windows Store app to find it. It may take a few hours for updates to reach everyone. Computers with Windows 8.1 already installed will go on sale Friday local time. That's also when people will be able to buy stand-alone copies of Windows 8.1.

The changes range from the cosmetic to improved functionality:

Restoring respect for the desktop

  • Start me up: The Start button is back in desktop mode, although not the way it was before Windows 8 came along. In Windows 7 and before, a click on Start would have brought up programs and important folders in a list. Now, one tap on Start flips you back to the new tile interface, where you can click or tap tiles to open programs. A long press brings up crucial settings such as the Control Panel.
  • Boot to desktop: You can now start up the machine in desktop mode, bypassing the tiles for a short time. That removes some of the headache for companies that want to use Windows 8 but don't want to buy a touch-screen monitor for every employee.

Touch and gesture updates

  • Onscreen keyboard swipes: The onscreen keyboard now includes the ability to type numbers or punctuation marks by swiping up or away from certain keys on the standard "QWERTY" layout, eliminating the need to toggle between numeric and alphabetic layouts. You can also select from suggested words mid-stream using side swipes and taps on the virtual spacebar.
  • Gesture-enabled apps: You can now wave in the air in front of the front-facing camera to get a response. For example, in the new app Bing Food & Drink, a right-to-left wave in "Hands Free Mode" flips through pages of a recipe.
  • Quicker tile organizing: You can tap and hold Windows tiles with your finger to move them. Another couple taps will allow you to resize them in one of four sizes. In the previous version, you had to go back to the mouse or touchpad and right-click on tiles to do this, and you were limited to two sizes.
  • Easier apps access: Finding all your apps takes just a swipe up on your start screen, as long as you don't do it from beyond the bottom edge. Before, you had to swipe up from the bottom edge, then tap on the All Apps button.

Small conveniences

  • Automatic updates: Apps update in the background, replacing the constant reminders to go to the Windows Store to update the apps yourself.
  • Smaller tablets: Windows 8.1 now has a home screen that looks good in portrait mode on screens measuring 7 inches to 8 inches diagonally.
  • Lock screen access: You can now answer Skype calls or take photos from the lock screen without having to log in. Just swipe down. You can also set other apps like Twitter to send notifications when the screen is locked.

Functional changes

  • Better multitasking: In Windows 8.1, you can run up to four apps at once side by side, double the previous amount, though you need a large, high-resolution monitor to do so (On their own, Microsoft's Surface tablets are not big enough for more than two). You can resize panes using a slider that moves side to side, instead of being limited to one larger window and one slender one. This is still not as capable as Windows 7 or in desktop mode, where you can open dozens of items in windows that can be resized horizontally, vertically and diagonally. And many app makers have yet to adapt, meaning some apps still appear as a thin sliver, even if you want them to take up half the screen.
  • Global search: Typing while on the tile-based start screen will pull up multiple search results — if applicable — from your computer, the Web and the Windows app store. If you're searching for a musician, you'll see a list of popular songs you can play using Xbox Music, and if it's someone famous (like President Barack Obama) you'll see biographical details, videos and other information. Before, you had to choose where to search: in apps, settings, computer files or on the Internet.
  • Email update: The standard-issue Mail app now has a "power pane" on left-hand side with folders for updates from social networks like Facebook, messages from favorite contacts and newsletters. Some of these features work only with Microsoft accounts such as Hotmail and Outlook.com, though. A new "sweep" command deletes multiple messages with a couple taps.
  • Better browsing: No longer are you limited to 10 open tabs in the tile version of Internet Explorer. Before, Web pages automatically closed without prompts when you try to open more. You can open as many as you want now. Better yet, you can have two different websites displayed side by side, the way you've long been able to before Windows 8 came along.

Fun stuff

  • Xbox music refresh: The music streaming app now optimizes playback over discovery with a layout that has more lists and smaller photos. It also adds the ability to create playlists from any website with a couple taps. When on a website featuring artists, swipe in from the right edge and tap the Share button followed by the Music button. It will create a song playlist based on those artists, which you can then stream for free.
  • Picture editing: A picture editor with pre-set effects comes with the update, allowing for photo touchups, cropping, contrast changes and other features.
  • Xbox One integration: You can pick up where you left off if you start playing a video purchased on Xbox Video on a tablet and then watch the rest on Microsoft's upcoming game console, Xbox One.

Comments on this story are pre-moderated. Before they appear, comments are reviewed by moderators to ensure they meet our submission guidelines. Comments are open and welcome for three days after the story is published. We reserve the right to close comments before then.

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Note: The CBC does not necessarily endorse any of the views posted. By submitting your comments, you acknowledge that CBC has the right to reproduce, broadcast and publicize those comments or any part thereof in any manner whatsoever. Please note that comments are moderated and published according to our submission guidelines.


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Facebook now lets teens share posts with whole internet

Facebook is now allowing teenagers to share their posts on the social network with anyone on the internet, raising the risks of minors leaving a digital trail that could lead to trouble.

The change announced Wednesday affects Facebook users who list their ages as 13 to 17.

'Teens tend to take more risks and don't always understand the consequences of their behaviour.'- Kathryn Montgomery, American University

Until now, Facebook users falling within that age group had been limited to sharing information and photos only with their own friends or friends of those friends.

The new policy will give teens the choice of switching their settings so their posts can be accessible to the general public. That option already has been available to adults, including users who are 18 or 19.

Automatic warnings

As a protective measure, Facebook will warn minors opting to be more open that they are exposing themselves to a broader audience. The caution will repeat before every post, as long as the settings remain on "public."

The initial privacy settings of teens under 18 will automatically be set so posts are seen only by friends. That's more restrictive than the previous default setting that allowed teens to distribute their posts to friends of their friends in the network.

In a blog post, Facebook said it decided to revise its privacy rules to make its service more enjoyable for teens and to provide them with a more powerful megaphone when they believe they have an important point to make or a cause to support.

"Teens are among the savviest people using social media, and whether it comes to civic engagement, activism, or their thoughts on a new movie, they want to be heard," Facebook wrote.

It added that the new feature lets them share more broadly "just like on other social media services."

Twitter and Google Plus already let teens post publicly, although Google Plus automatically provides extra warnings to teenagers that are not offered to adults.

The question remains whether teens understand how sharing their thoughts or pictures of their activities can come back to haunt them, said Kathryn Montgomery, an American University professor of communications who has written a book about how the Internet affects children.

"On the one hand, you want to encourage kids to participate in the digital world, but they are not always very wise about how they do it," she said. "Teens tend to take more risks and don't always understand the consequences of their behaviour."

The relaxed standards also may spur teens to spend more time on Facebook instead of other services, such as Snapchat, that are becoming more popular hangouts among younger people. Facebook CEO Mark Zuckerberg, though, says that the company's internal data shows its social network remains a magnet for teens.

Sharing 'at the heart of Facebook's business model'

Giving people more reasons to habitually visit its social network is important to Facebook because a larger audience helps sell more of the ads that generate most of the Menlo Park, California, company's revenue.

"What this is really about is maximizing the kind of sharing at the heart of Facebook's business model," Montgomery said. She worries that unleashing teens to share more about themselves to a general audience will enable advertisers to collect more personal data about minors "who aren't aware that their movements and interests are under a digital microscope."

Facebook hasn't disclosed how many of its nearly 1.2 billion users are teens. The social network was initially limited to college students when Zuckerberg started it in 2004, but he opened the service to a broader audience within a few years.

The teen audience is large enough to give Facebook periodic headaches. As its social network has steadily expanded, Facebook has had to combat sexual predators and bullies who prey upon children.

Facebook doesn't allow children under 13 to set up accounts on its service but doesn't have a reliable way to verify users' ages.


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5-metre-long sea creature discovered off California coast

Written By Unknown on Rabu, 16 Oktober 2013 | 22.11

A marine science instructor snorkeling off the Southern California coast spotted something out of a fantasy novel: the silvery carcass of a five-metre-long, serpent-like oarfish.

Jasmine Santana of the Catalina Island Marine Institute needed more than 15 helpers to drag the giant sea creature to shore on Sunday.

Staffers at the institute are calling it the discovery of a lifetime.

"We've never seen a fish this big," said Mark Waddington, senior captain of the Tole Mour, CIMI's sail training ship. "The last oarfish we saw was three feet long."

Because oarfish dive more than 914 metres deep, sightings of the creatures are rare and they are largely unstudied, according to CIMI.

The obscure fish apparently died of natural causes. Tissue samples and video footage were sent to be studied by biologists at the University of California, Santa Barbara.

Santana spotted something shimmering about nine meters deep while snorkeling during a staff trip in Toyon Bay at Santa Catalina Island.

"She said, 'I have to drag this thing out of here or nobody will believe me,"' Waddington said.

After she dragged the carcass by the tail for more than 23 metres, staffers waded in and helped her bring it to shore.

The carcass was on display Tuesday for students studying at CIMI. It will be buried in the sand until it decomposes and then its skeleton will be reconstituted for display, Waddington said.

The oarfish, which can grow to more than 15 metres, is a deep-water pelagic fish — the longest bony fish in the world, according to CIMI.

They are likely responsible for sea serpent legends throughout history.


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