earth14 小时
Pterosaurs took flight millions of years before birds, according to new discovery
Long before birds fluttered their wings and took their maiden flight, it was pterosaurs - the distant cousins of birds - that ...
cybernews3 天
A win for drone design: watch this robot fly like a raven
The design, inspired by birds, allows drones to walk, hop, and jump into flight, making more places accessible to autonomous drones without a launcher.