The Surprising Reason Birds First Grew Feathers
0
0
3,325 المشاهدات·
01/01/24
في
Discovery
When birds first grew feathers 150 million years ago, their function was not necessarily to help with flight. From: DAVID ATTENBOROUGH S CONQUEST OF THE SKIES: Rivals http://bit.ly/1YjydHc
أظهر المزيد
0 تعليقات
sort ترتيب حسب
