Ask The Naked Scientists

And can a team of cyclists solve the looming energy crisis

What does anaesthetic do? and why don’t the colour stripes in toothpaste mix?

Would fireworks work on Mars? And what do steroids do to the body?

How do meteors form? Is the universe finite or infinite?

Setting glue, the difference between mist and fog, and are gravitational waves audible?

And more from this week's quick fire science questions with Dr Chris Smith.

Do we need to take diet supplements? And is there any merit in acupuncture?

Could we ever learn to get used to pain, and is your car's speedometer lying to you?

Why can't we go backwards in time? And why can't different species reproduce?

How far back in time can the James Webb telescope see? And is freezing your jeans as good as a wash?

Yoghurt or probiotics? Why is milk white? Why does my heart rate increase in cold water?

Plus, chainsaw hypotheses, Star Trek and mathematical puzzles...

A children's special edition; can Dr Chris Smith crack their imaginative science dilemmas?

Researchers dose mice with a bottomless boozy bath to find out if alcohol warms the body, sounds rather nice

Will a donor arm leave a different DNA fingerprint at a crime scene...?

What are stars made of? How do ants breathe? How does a person catch chickenpox?

Aeroplanes also have round windows, but why. Plus, farts, brain capacity and lightning travelling through your plumbing...

Plus do dogs get depressed, and why do my ears pop during take off aboard an aeroplane?

And what's the difference between a sickness, a disease, an illness, an affliction, a malaise and a disorder?

And why are humans still born with bits we don't need - will evolution do away with them?

Plus, firelighters and food, crocodiles and Helicobacter pylori...

What's best for my car and the planet?

Are their children genetically brother and sister?

And what's spacetime and how does entanglement work?