Found near Australia, Solenostomus snuffleupagus is a shaggy swimmer that closely resembles Mr. Snuffleupagus from Sesame Street.

Male primates may be larger than females partly because of pressure from rival groups, not just competition with males inside their own group.

Hours of diving videos and hundreds of survey responses reveal the common diver mistakes that can cause irreversible reef damage.

During courtship, male scissor-tailed nightjars crack their wings together to make a sharp snapping sound. It's the result of colliding arm bones.

Adult finches make "heat calls" as the temperature rises. Exposure to the song prepares their unhatched young's brains for the heat.