Why are there redheads? Birds might hold the clues

Red coloration—historically seen as costly in vertebrates—historically seen as costly in vertebrates—might represent some physiological benefit after all, according to research published in the journal Physiological ...

Barnes & Noble launches new Nook HD

Barnes & Noble is rolling out two new versions of its Nook tablet with sleek new hardware and a sharper high-definition screen. The bookseller's move heightens the already intense tablet wars heading into the holiday season.

Barnes & Noble's unveils $249 Nook Tablet

Barnes & Noble unveiled a $249 Nook Tablet Monday just ahead of the crucial holiday shopping season as the book retailer fights for a larger share of the lucrative e-book market.

Barnes & Noble launches touch-screen Nook for $139 (Update)

The lighter, slimmer, cheaper new version of Barnes & Noble's e-reader has a black-and-white touch screen and aims squarely at the "grandma" demographic - or at least those craving a simpler e-book reader.

Barnes & Noble cuts price for Nook

(AP) -- Barnes & Noble cut the price on its original Nook electronic reader, undercutting its chief competitor, Amazon.com's Kindle, and will also offer a lower-price Nook with a Wi-Fi connection.

Natural antioxidants give top barn swallows a leg on competitors

A new University of Colorado at Boulder study indicates North American barn swallows outperform their peers in reproduction -- the "currency" of evolutionary change -- by maintaining a positive balance of antioxidants commonly ...

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