That changed when Michael Castaño-Díaz and Sebastián Gallan Giraldo, a Ph.D student and research assistant, spotted a ...
A baby hummingbird might have a special way of warding off predators, which threaten tropical hummingbird species in infancy.
Kobayashi and his colleagues christened the new therizinosaur, Duonychus tsogtbaatari. The genus name means “double claw”, ...