We all know what turbulence is, but nobody understands it.

How does a smooth flow suddenly become turbulent? The Reynolds number helps understand the transition.

Dive into the maths of turbulence!

The mathematical problem with turbulence.

Soon you will be able to step inside a mathematical space and experience the beauty and importance of maths!

It's not just evil villians who can blow smoke rings, it seems peat moss has been doing it for millennia.

Plus talks to Christine Hogan, programmer, sysadmin and author, now studying aerodynamics and hoping to become a member of a Formula One team.

Have you ever noticed what happens when you spin a coin on a table? As the coin starts to fall over and roll on its edge, its spin gets faster and faster until it suddenly stops altogether.