A long-standing debate among evolutionary scientists goes something like this: Does evolution happen in a predictable pattern or does it depend on chance events and contingency? That is, if you could ...

A thousand meters up in a humid, cloud-covered forest, amidst a slew of twigs and limbs, an onlooker spotted something different—this branch had legs. But even for a stick insect, a forest dweller ...

It is a fantastical tale that transports us through space to California, and through time, some 1.23 million years back. Its heroes, twigs, are disguised as leaves. Yet, they move! The ...