Dr Karl

What is belly-button fluff?
Why do whales get beached?
Why is there something rather than nothing?
What would the effect have been if this week's near-miss asteroid had hit the Earth?
Can you be scared to death?
How can people be heard simply by the expulsion of air?
Why does scratching an itch relieve it?
What's the cleanest fuel to heat the home?
What causes people to lisp?
Does dry air increase static shocks?
Can you overdose on garlic?

The massively erudite and urbane Dr Karl is on sublime form this week. Catch him here on Radio 5's Up all Night, between hours 2 and 3, or here on the podcast.

It's a genuine tour de force of popular science.