If you’ve ever heard stories of a naughty little fish with a penchant for swimming up urethras, don’t believe the hype—these tiny Amazonian catfish are just victims of a very old rumor mill. Hosted by ...

From riverbanks to shallow lakes, Spinosaurus combined display, biomechanics and hunting power in one of evolution’s ...

The Portuguese man-of-war looks like a jellyfish but isn’t one. Learn where it’s found and what to do if you encounter one.