The 12-million-year-old bones of a previously unknown species named Danuvius guggenmosi challenge the prevailing view about when and where our ancestors first started walking upright.

The evolution of different ways of flying in birds affected wing range of motion, but not wing shape.

The developers envision their device could be used to collect water samples in hazardous environments.

Watch a type IV pilus, which powers some bacterial species' movement, in action.

Watch young birds move like rock climbers.

Slithering snakes mimic waves of light, “diffracting” as they pass by an obstacle.

The colossal fish bank like airplanes when turning.

When heated experimentally, the secretory organ releases oil through pores on the animal’s head, producing a slick coating thought to reduce drag in swimming fish. 

Robert McNeill Alexander, best known for his work on animal locomotion, has passed away aged 81.