New research shows animal evolution often involves losing genes and becoming less complex.
This newly discovered species is the oldest one known to resemble today's penguins in both size and leg proportions, unlike its giant co-habitants at the time.
An internet-breaking 6'4" steer isn't the only animal to reach gigantic proportions.
'Molecular fossils' in the DNA of elephants could help explain why their testicles are inside their bodies.
People used to think that boy lions had big shaggy manes to protect their necks from being bitten or scratched during fights. But scientists soon realised this idea didn't make much sense.
Bipedal movement has existed in modern reptiles for much longer than we previously knew.