This week we find out why certain mushrooms contain hallucinogens, plus we ask, how long could you survive by eating your own limbs? Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

How long can one survive on self cannibalisation?

Each week we set out to solve one of the world's weirdest, wackiest, funniest and funkiest scientific puzzles. And along with the answer there's a brand new question to think about for next time...