How to CT scan a 400-pound crocodile

At 61, Bill had begun showing changes in his health—decreased appetite, weight loss and abdominal bloating. But his bloodwork was normal, leaving the cause of his symptoms unknown. The next step was clear: Bill should get ...

Once a legend, humpback whales make a comeback in Brazil

Female humpback whales off the coast of Brazil now have their pick of mates, who slap the water with their tails and jostle for attention—a scene that would have been unthinkable a few decades ago.

RNA droplets may have helped start life on Earth

It's one of the origins-of-life chicken-or-egg problems: How could RNA have helped give rise to the first cells before there were cells to contain it?

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