What governs the speed at which raindrops fall, sediment settles in river estuaries, and matter is ejected during a supernova? These questions circle around one, deceitfully simple factor: the rate at ...

A new study revisits a century-old question about how turbulence starts. The findings could potentially influence not only aircraft engineering but even the design of mechanical heart valves, and ...

Randomness favours the worm becoming free because its head can move in many ways that will help to propel it forwards, but only one that would push it backwards. Because of the intrinsically random ...