Scientists have managed to split the atom, harness the power of the elements and even put men on the moon. However, there are some mysteries that have never been solved, such as how far a squirrel can lean before it falls over.

Thankfully, there is now proper, documented scientific research on the subject, bringing us nearer to solving this problem that has been plaguing mankind for centuries. The Squirrel Fishing site is the ultimate Rodent Performance Evaluation resource, providing details on the intelligence and cunning of our furry, furtive friends.

Despite initial setbacks ("Early attempts to measure squirrel performance involved chasing them around and trying to guard all nearby trees"), researchers Nikolas Gloy and Yasuhiro Endo of the Engineering and Applied Sciences division of Harvard University have produced the most in-depth guide to squirrel psychology yet.

Grab your nuts and head off there for a laugh at some scientists who obviously have far too much time on their hands...