Off the Atlantic Coast, fishermen occasionally pulled up a catch that looked like it was grinning back at them. The Sheepshead fish carried a set of blunt, molar-like teeth that appeared eerily human ...

Yara Haridy, an evolutionary biologist at the University of Chicago, likes to stun people by telling them that our skeletons evolved from a jawless fish. "Much of what we have today has been around ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...