Sperm has been fooling us for more than 350 years: They spin not swim

Sperm is critical for the fertilisation of almost every living organism on our planet, including humans. To reproduce, human sperm have to swim a distance equivalent to climbing Mount Everest to find the egg.

They complete this epic journey simply by wiggling their tail, moving fluid to swim forwards.

Though over 50 million sperm will fail to reach the egg — the equivalent to more than six times the