The Waite family wanted to know if fish yawn, so Heather Wark spoke to Iain Barber from Nottingham Trent University, to find out. Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Why does fresh pasta rise during cooking?

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...