A cache of feathers preserved in amber, dating from around 70 to 85 million years ago, was just found in Canada, showing that border between winged dinosaurs and the earliest avians. The study indicates that these feathers, relatively modern, were already appearing even before the non-avian dinosaurs were extinct.
Click to see some amazing photos of feathers trapped in amber.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.