Why do male mammals have nipples? Do we have a music taste gene? Plus a fruit fly experiment.

Ever wondered whether birds are evil? Plus do birds have funerals like humans do?

Do you get squeamish at the sight of blood? Plus operating on fish and pollution in your lungs.

Why do we float horizontally in water? Why do some adults develop anaphylaxis? Is soda water good for you?

Can you overcome gluten intolerance? Is toasted bread good for you? Should your poo sink or float?

What happens if you microwave a human? Is there anything wetter than water? What are the benefits of floating tanks?

How will the galaxy Andromeda be feeding on our galaxy The Milky Way? Plus climate change, a positive future and sleeping with your eyes open.

Have the planets ever lined up in the solar system? Why can some people whistle in tune, but not sing in tune? Can you water plants using hot water?

Is a Googleplex the biggest single number? Are rising sea levels only caused by ice melting? Why do we get blocked noses?

Why do we have toe nails? Can we dry our clothes by freezing them? Why are sunrises and sunsets different colours?