主播大秀

Series 20

The Problem of Infinite Pi(e)

'How did we discover pi? How do we know that it鈥檚 infinite and never repeats?' asks Alex.

• 35 mins

Series 20

The Riddle of Red-Eyes and Runny-Noses

鈥淎re allergies really on the increase?鈥� wonders Ally

• 36 mins

Series 20

The Puzzle of the Plasma Doughnut

鈥淗ow does fusion work, and how can we do it safely on earth?鈥� asks Les Walker

• 39 mins

Silly Studies: The Pre-Series Teaser

We鈥檙e almost back! As a cheeky aperitif, our sleuths review some surprising science.

• 12 mins

Series 21

The Case of the Blind Mind's Eye

'Why can't I see images in my mind?' asks Jude from Australia.

• 43 mins

Series 21

The Magnetic Mystery

What is a magnetic field? wonders Lucas.

• 43 mins

Series 21

The Puzzle of the Pyramids

Did aliens build the pyramids!?

• 36 mins

Series 21

The Resurrection Quest

Can we bring extinct species back from the dead?

• 38 mins

Series 21

The Mind Numbing Medicine

'How do anaesthetics work?' asks Alicia.

• 43 mins

Series 21

The Impossible Number

What is the 'imaginary' number - and why is it so incredibly useful?

• 41 mins