The oldest known drawing, sharks attacking dolphins, and the first fish to pass the mirror test.
The Ig Nobel Prizes honour achievements that first make us laugh, then make us think. We take a look at this year’s winners: from banana peels to people dressed as polar bears!
Bookworms, gut worms, mycoplasma ghosts and the dangers of grapefruit. Plus the evolution of vision, and a US-Russian crew to spend a year in space.