Satish asks: "how does a bat sleep the whole day hanging from a tree? Won't being upside down affect blood circulation?" Phil Sansom went to find the answer, with help from Western University's Brock Fenton... Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

What time should I water my plants?

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...