Italian wall lizards introduced to a tiny island off the coast of Croatia are evolving in ways that would normally take millions of years to play out, new research shows.

In just a few decades the 5-inch-long (13-centimeter-long) lizards have developed a completely new gut structure, larger heads, and a harder bite, researchers say.

Lizards Rapidly Evolve After Introduction to Island

Mammals took to the skies at least 70 million years earlier than previously thought, scientists say.

A fossil uncovered in China suggests mammals were trying out flight at about the same time - or even earlier - than birds, the team reports in Nature.

And everyone thought the Wright Brothers were nuts with their talk of non-bird-things flying...

BBC NEWS | Science/Nature | Earliest flying mammal discovered