An epic bout of cold weather quickly altered a population of lizards—an example of natural selection in action. Christopher Intagliata reports. -- Read more on ScientificAmerican.com
The Cretaceous Period was a dangerous time for many animals, even for the “dinosaur equivalent of a tank.” Watch how researchers analyzed the pristine remains of a heavily armored... -- Read more on ScientificAmerican.com
Humans appear well equipped to recognize the alarm calls of other animals—perhaps because sounds of distress tend to have higher frequencies. Karen Hopkin reports. -- Read more on ScientificAmerican.com
The North American walnut sphinx caterpillar produces a whistle that sounds just like a songbird's alarm call--and the whistle seems to startle birds. Christopher Intagliata reports. -- Read more on ScientificAmerican.com
Exposure to existing antibiotics can imbue infectious bacteria with resistance that also kicks in against new drugs related to the originals. Christopher Intagliata reports. -- Read more on ScientificAmerican.com