Rare Sighting of All-White Orca Whale

The rare all-white orca whale was spotted swimming with its pod. Photo by E. Lazareva / Newscom On a summer morning in 2010, off the coast of Kamchatka in eastern Russia, scientists made a rare discovery. Photos, released earlier this week (and posted on our Retina Tumblr blog) document what may be the first verified sighting of its kind: an all-white adult...

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What were the largest species of all time? Does the Tyrannosaurus rex make the list?

Titanoboa was one gigantic snake. It lived around 58 to 60 million years ago, a scant several million years after the mass extinction that wiped out the dinosaurs. It could grow 42 feet or more in length and weigh more than a ton, vastly outslithering the previous fossil record holder, a 40-million-year-old, 33-foot-long snake called Gigantophis. But Titanoboa is...

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