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Tooth Loss in Birds Occurred About 116 Million Years Ago
Tooth Loss in Birds 116 Million Years Ago
2014/12/30
RIVERSIDE, Calif. — The absence of teeth or “edentulism” has evolved on multiple occasions within vertebrates including birds, turtles, and a few groups of mammals such as anteaters, baleen whales and...
Birds of a different color(图)
Birds of a different color control pigmentation of human skin
2014/3/21
Scientists at the University of Utah identified mutations in three key genes that determine feather color in domestic rock pigeons. The same genes control pigmentation of human skin, and mutations in ...