Researchers believe these creatures started out on four legs and later began walking on two legs as they grew.

TROY, Ohio — More than five years ago, someone left a kitten with twisted back legs at a Missouri animal shelter. The cat was transferred to specialists in Iowa who amputated her left hind leg. She ...

The evolution of novel traits is a central theme in understanding how organisms adapt to their environments, and sea robins (family Triglidae) provide a fascinating case study. Recent research, led by ...

There’s unique, and then there’s the pangolin. These incredible creatures resemble something from prehistoric times with their protective suit of armor. However, it isn’t just how they look that sets ...