fossils reveal a complete feathery coat with spine-like filaments distributed among the feathers. The giant arms sported scythe-like claws that were about 1 m (3 ft) long: the biggest claws of all time... (转)
羽毛之间分布着棘状细丝,还拥有了1m长的爪子,由史以来最大的……


羽毛之间分布着棘状细丝,还拥有了1m长的爪子,由史以来最大的……

