Why do we feel like vomiting after rigorous exercise? Does distance or speed burn more calories? Plus, the movement of air pollution.

Does smoke benefit the soil? Plus, what can we expect to see in the future for fire prevention?

Linda Marigliano and Dr Karl take your questions for one last time together.

Coconut oil, inhaling smoke and why you might feel tired when you're doing nothing?

Chernobyl Exclusion Zone, what is dark matter and what would happen if flies don't exist?

How much information can your brain hold? How do genetics work and does the clitoris have multiple purposes?

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?