Brian Cox

It's a technology they now use in Hollyoaks.

This is... My wife, she was a keeper.

I absolutely mean to say that.

This is like a complaint, a letter of complaint.

One of the ones we get from Radio 4 listeners.

It goes on for a long time and it's in green ink.

I watch an obnoxious couple get too close to an enclosure, ignoring numerous signs of warning about the hippo's curious habit of smashing their tails to spread their excrement widely.

I enjoyed watching them sprayed by flinging poo.

For them, flings could only get better.

LAUGHTER

I've just got a Brian Coxolotl.

I've heard that rumour.

LAUGHTER Thank you to our panel, Joe Setchell, Robin Dunbar and Dave Gorman.

APPLAUSE

Next week, it's Christmas.

And thanks to Brian's air miles, we're going to the North Pole to meet Father Christmas and his reindeer.

So we're going to ask how exactly do reindeer evolve to fly?

And what are the health ramifications of eating two billion mince pies and drinking a billion glasses of sherry in one night?

Or how do living things survive in polar regions?

It'll be one or the other.