LifeAmazing four-legged fossil shows how walking whales learned to swim A fossil discovered in Peru shows that early whales managed to spread around the world while they were still capable of walking on land News
LifeHow the zebra got its stripes: The problem with 'just-so' stories The mystery of why zebras have stripes has puzzled biologists for decades, and while we are closing in on the answer, the question isn’t settled yet Analysis