Most species on Earth exist as two biological sexes, and the exchange of genes between males and females is vital for their ...

In seahorses, males are the ones to bear offspring. A research team led by Konstanz evolutionary biologist Axel Meyer examined the cellular basis for "male pregnancy".

When you’re watching for this songbird, look out below. The Eastern towhee spends most of its time on the ground, whether ...

Researchers have newly described three extremely rare species of toad that leapfrog over the egg-to-tadpole stage and give birth to toadlets.

Seven species of a frog-like insect that were discovered in a rainforest have been confirmed as new to science following an ...