We all know it and science has proved it - wires, string, and hair will inevitably tie themselves in knots.
This astonishing non-revelation is one of 10 pieces of real research honoured this year with Ig Nobel Prizes.
The spoof alternatives to the rather more sober Nobel prizes were presented in a ceremony at Harvard University.
Other winners included studies that showed coca cola was an effective spermicide; and that fleas on dogs jump higher than fleas on cats.
Read the rest here.