5 yr old Georgia asks how did the cells in her mum's tummy know to make her brain cells? A Nobel Laureate provides the answer! Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Do dark matter planets exist?

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...