Chelsea Clinton visits Nigeria on health mission

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Roche declines comment on Illumina interest

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Source: http://news.yahoo.com/roche-declines-illumina-interest-063203612--finance.html

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Complex brain goes back half a billion years

The oldest brain ever found in an arthropod ? a group of invertebrates that includes insects and crustaceans ? is surprisingly complex for its 520-million-year age, researchers report Wednesday.

The fossilized brain, found in an extinct arthropod from China, looks very similar to the brains of today's modern insects, said study researcher Nicholas Strausfeld, the director of the Center for Insect Science at the University of Arizona.

"The rest of the animal is incredibly simple, so it's a big surprise to see a brain that is so advanced, as it were, in such a simple animal," Strausfeld told LiveScience.

The discovery suggests that brains evolved a complex organization early on in history, he added.

The evolving insect brain
Arthropods include any animal with an exoskeleton, jointed legs and a segmented body, from lobsters to scorpions to beetles to butterflies. There is controversy about how these various creatures evolved, however. One theory holds that insects evolved from ancestors not unlike today's branchiopods, which are extremely simple crustaceans such as fairy shrimp and water fleas. Branchiopods have simpler brains than insects and higher crustaceans, Strausfeld said, so this theory of evolution holds that both higher crustaceans and insects evolved very similar complex brains after splitting off from this common branchiopod-like ancestor. [Dazzling Photos of Dew-Covered Insects]

Alternatively, all of these groups ? insects, branchiopods and higher crustaceans ? could have evolved from an ancestor with a complex brain, with branchiopods regressing later.

"So the question was, 'What was the early brain, what did it look like? Did it look simple or did it look complex?'" Strausfeld said.

That's not an easy question to answer, given that brains rarely get fossilized. But Strausfeld's earlier work on arthropod fossils convinced him it could be done. He just had to go to China, home of an amazing collection of stunningly preserved ancient fossils.

Last-minute discovery
In China's Yunnan province, paleontologists have long uncovered fossils from the Cambrian period, which ran from about 542 million to 488 million years ago. These fossils are very well-preserved.

For five days, Strausfeld and his colleagues poured through fossils, searching for dark silhouettes of preserved brains inside ancient arthropod heads. There was one fossil that remained elusive, however: A specimen Strausfeld had read about in a paper by Swedish researchers. They thought they'd seen a fossilized brain.

With only a few hours left in the lab, Strausfeld's colleague, Xiaoya Ma, of the Natural History Museum in London went hunting for the missing specimen. An hour and a half later, she returned with the fossil, an extinct armored creature just a few centimeters long called Fuxianhuia protensa. [25 Amazing Ancient Beasts]

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   1. How will Nobel Prize handle future Higgs hassle?

      Science editor Alan Boyle's blog: Next year, the committee behind the Nobel Prize for physics could have a huge Higgs hassle on its hands. And maybe that's a good thing.

   2. Complex brain goes back half a billion years
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"I looked at the microscope and I think I said something like, 'Whoopee, I think we've got the crown jewels!'" Strausfeld said. Under magnification, he could see the dark brown silhouette of preserved brain nestled in the arthropod's skull.

"It's pretty bloody marvelous, actually. ? I was sitting looking at the thing, going, 'Oh my goodness gracious,'" Strausfeld said. With only five hours left before he had to leave to give a scheduled talk and fly home, Strausfeld got busy photographing the discovery.

An analysis of the brain revealed it to be in three parts, just as the brains of modern insects are in three parts (known as the protocerebrum, deutocerebrum and tritocerebrum). Nerves from the eyes extend into the protocerebrum, nerves from the antennaes feed into the ancient creature's deutocerebrum, and a third nerve root from further back in the body extends into the tritocerebrum. The researchers report the findings in this week's issue of the journal Nature.

This complex, insectlike brain suggests that rather than insects arising from simple branchiopods, today's arthropods descend from a complex-brained ancestor. Branchiopods would later have shed some of this complexity, Strausfeld said, while other crustaceans and insects kept it. In fact, he said, the brain may have evolved to segment into three parts very early on; mammals, including humans, have a forebrain, midbrain and hindbrain, suggesting a common organization.

"Lots of people don't like that idea, sharing a brain with a beetle, but there's good evidence suggesting that you do," Strausfeld said.

Bug brains may seem simple to us, but arthropods are at the base of many a food chain, making them crucial creatures, Strausfeld said. He and his team plan to return to China to hunt out more ancient arthropod brains.

"What we want to do, of course, is go deeper in time," Strausfeld said.

Follow Stephanie Pappas on Twitter @sipappasor LiveScience @livescience. We're also on Facebook& Google+.

Copyright 2012 LiveScience , a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Source: http://www.msnbc.msn.com/id/49362131/ns/technology_and_science-science/

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Teenage Hacker Scores $60,000 From Google For Discovering Security Issue In Chrome (Again)

A teenage hacker who goes by the name of "Pinkie Pie" will receive $60,000 in prize money from Google, by producing the first Chrome vulnerability at the Hack in the Box conference on Wednesday. The exploit was discovered and?successfully launched just ahead of the deadline for completion, according to early reports?from the event. Before awarding the cash prize, Google had to first verify and confirm the vulnerability - which it just now did, the company tells us via email. More details have also been posted to the Google Chrome blog.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/8FFuGONSJTE/

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Oil prices rise on wholesale stockpiles and sales

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NoteCase Is Back in Pro Form - but There's a Hitch

NoteCase Pro is a note-taking and outliner application with a hefty list of features if you venture beyond the free version and buy into the shareware license. Even if you settle for the unregistered lite version, NoteCase Pro is an impressive tool for cataloging your notes and collected information into a hierarchically organized database. NoteCase Manager was well known in the Linux/Unix world.

Source: http://ectnews.com.feedsportal.com/c/34520/f/632000/s/245265f7/l/0L0Stechnewsworld0N0Crsstory0C763460Bhtml/story01.htm

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Amazon Kindle Paperwhite review

More Info

• Amazon announces $119 Kindle Paperwhite with illuminated, capacitive touch display
• Amazon Kindle Paperwhite hands-on
• Amazon breaks down its Kindle Paperwhite light technology (video)

If you had told us at roughly this time last year that the e-reader race would be heating up going into the 2012 holiday season, we would have disagreed. If anything, 2011 seemed like the beginning of the end. Spurred on by the tablet explosion, companies like Amazon, Barnes & Noble and even Kobo were looking toward that space for inspiration, introducing flagship devices on which reading was just one of many features. Heck, even the readers themselves started to look more tablet-like, with many abandoning of physical keyboards in favor of infrared touchscreens.

But here we are at the end of September, and this product category has never been more exciting. Back in May, Barnes & Noble captured our hearts and midnight reading marathons with the Nook Simple Touch with GlowLight, a wordy name for a great little device that made reading in bed at night a little easier. (A problem, according to Barnes & Noble, that was tearing the country's families apart.) But don't let it be said that Amazon doesn't believe in the American family. Earlier this month, the company launched the Kindle Paperwhite, the latest addition to a product lineup that has more or less become synonymous with the term "e-reader."

At that launch event, CEO Jeff Bezos described the four years of R&D that went into the front light technology powering that bright screen. It was clear from our hands-on time with the device that, although Amazon is placing extra emphasis on the Fire line these days, it still has a lot invested in the e-reader fight. The sharpened, illuminated text is impressive, and Amazon has gone so far as to describe this as the Kindle it's always wanted to build. That's all well and good, but how does it compare to similar offerings on the market? Is this worth the $119 asking price (with ads)? Let's find out.

Gallery: Amazon Kindle Paperwhite review

Continue reading Amazon Kindle Paperwhite review

Amazon Kindle Paperwhite review originally appeared on Engadget on Sun, 30 Sep 2012 21:00:00 EDT. Please see our terms for use of feeds.

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Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/gb-mmyPDpKI/

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