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.
The much-coveted spoof prizes are said to reward scientific achievements which "cannot, or should not, be reproduced"; achievements that "first Germany leads 'clean coal' pilot ...
German Discus Champion Dietzsch Rules Herself Out of Olympics ...
G8 aims to halve carbon emissions by 2050 ...
Star duo in Brazil Olympics squad ...
UK Mars rover hopes face set-back ... make people laugh, and then make them think".
They are run by the science humour magazine Annals of Improbable Research.
Seven of the 10 winners this year paid their own way to receive their prizes at the famous US university.
All joined in the fun. Three Japanese scientists sang their acceptance speech for the award which honoured their research showing that slime moulds (amoeba-like organisms) can find their way through mazes.
Like the other winners, their study was genuine research published in a scientific journal - in their case, the prestigious journal Nature.
The ceremony began with past Ig winner Dan Meyer - the co-author of a British Medical Journal study on Sword-swallowing and Its Side Effects - swallowing a sword.
Marc Abrahams, master of ceremonies and editor of the Annals of Improbable Research, closed the event with the traditional words: "If you didn't win an Ig Nobel Prize tonight - and especially if you did - better luck next year."
The full list of winners:
Nutrition: Massimiliano Zampini and Charles Spence for their study showing that food actually tastes better if it sounds crunchier.
Peace: The Swiss Federal Ethics Committee on Non-Human Biotechnology and the citizens of Switzerland for adopting the legal principle that plants have dignity.
Archaeology: Astolfo Gomes de Mello Araujo and Jose Carlos Marcelino for demonstrating that armadillos can turn the contents of an archaeological dig upside down.
Biology: Marie-Christine Cadiergues, Christel Joubert and Michel Franc for showing that fleas on dogs can jump higher than fleas on a cats.
Medicine: Dan Ariely for demonstrating that expensive fake medicine is more effective than cheap fake medicine.
Cognitive Science: Toshiyuki Nakagaki, Hiroyasu Yamada, Ryo Kobayashi, Atsushi Tero, Akio Ishiguro and Agota Toth for demonstrating that slime moulds can solve puzzles.
Economics: Geoffrey Miller, Joshua Tyber and Brent Jordan for discovering that the fertility cycle of a lap dancer affects her tip-earning potential.
Physics: Dorian Raymer and Douglas Smith for proving that heaps of string or hair or almost anything else will inevitably tangle themselves up in knots.
Chemistry: Sheree Umpierre, Joseph Hill and Deborah Anderson for discovering that Coca-Cola is an effective spermicide (it was shared with C.Y. Hong, C.C. Shieh, P. Wu and B.N. Chiang who showed the opposite).
Literature: David Sims for his passionately written study "You Bastard: A Narrative Exploration of the Experience of Indignation within Organizations."
(BBC)
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