Scientists say that the 360-million-year-old animal that was first to have moved around on land did not do so using four legs.

According to a study recently published in the science journal Science, elephants have a sixth toe, a previously unknown and underrated digit that is critical in helping the enormous mammals ambulate.

Researchers said on Wednesday that the Tyrannosaurus rex grew faster and weighed more than previously thought.

A team of researchers are attempting to uncover the precise details of how kangaroos bounce.

Scientists said on Tuesday that elephants' legs work like a four-wheel drive vehicle, making them unique in the animal kingdom.