Which would have produced more carbon: the Icelandic volcano or the planes which would have flown if it hadn't erupted?  Find out in this QotW.  Plus, we ask if altitude can affect the hours of daylight one experiences. Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Do you experience more daylight atop a mountain?

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...