Bearded dragons modify their colors for camouflage or to maintain body temperature, or to communicate with other dragons. Jason G. Goldman reports. -- Read more on ScientificAmerican.com
Scientists printed out 3-D models of Lucy's bones, showing a breakage pattern consistent with a fall from a tree. This video was reproduced with permission and was first published on August 29,... -- Read more on ScientificAmerican.com