And how do we know?
Might your smartphone be bad for your sperm?
How worried should we be about climate change?
Are electric planes the vehicles of the future, or just a pipe dream?
What's going on in a wombat's stomach?
New legislation means that smokers see a graphic health warning on cigarette packaging as constant reminder of...
Can science help kick the habit?
It was over to planetary geologist David Rothery
Aye up, duck!
Why do we replace one unhealthy vice with another?
How do they work?
"Is it like gamete wacky races?"
And how are planets born in the first place?
Or is this behaviour unique to humans?
And how to plasma balls work?
Buckle up, adrenaline junkies...
Chris Smith put this to physicist Jess Wade
Men have lower voices that women, can that be said for the animal kingdom?
Chris Smith put this question to planetary geologist David Rothery
Why does wearing wellies result in feeling pressure in a puddle, when going barefoot doesn't?
And why is it STILL on my walls?
Will lunar living be in the near future?
Is it the battle of the sexes? Or the battle of the ages?
Is it true? What's the mechanism behind it?
The whole panel joined in to tackle this listener question...