How the world's fastest muscle created four unique bird species

When the male bearded manakin snaps its wings at lightning speed, it's more than part of an elaborate, acrobatic mating ritual. The tiny muscle doing the heavy lifting is also the reason this exotic bird has evolved into ...

African fires wipe out endangered rhino's favorite foods

Fires in the African savannah – planned by national park staff to regenerate the preferred grasses of grazers such as wildebeests and zebras – are killing the few foods that endangered black rhinos love to eat.

Bats go quiet during fall mating season

Giving someone the "silent treatment" during courtship might not be the best strategy for romance. But, new research shows hoary bats fly with little or no echolocation at all as a possible mating-related behavior.

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