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Series 18

The Slippery Situation

'What is the most slippy thing in the world?' asks 8 year old Evelyn from London

• 37 mins

Series 18

The Venomous Vendetta

Will a venomous snake die if it bites itself? asks Janni in Amsterdam

• 42 mins

Silly Studies: The Pre-Series Tease

We鈥檙e back! Rutherford and Fry review the silliest studies sent in by Curios

• 10 mins

Series 19

The Mystery of the Teenage Brain

Why do my teens struggle to get out of bed in the morning? asks Michelle.

• 33 mins

Series 19

The Weird Waves of Wi-Fi

鈥淗ow does Wi-Fi work - is it magic?鈥� asks Abby

• 34 mins

Series 19

Surprising Symmetries

We鈥檝e got two eyes, two arms, two legs - but only one heart. Why!? asks Joanne.

• 33 mins

Series 19

The Shocking White Hair

Can human hair turn white overnight from shock? Hannah and Adam investigate greying hair.

• 34 mins

Series 19

The Turn of the Tide

Why are tide times and ranges so different around the UK, asks Lynn?

• 34 mins

Series 19

The Colour Conundrum

'How do we see colour - and why are some people colour blind?鈥� asks Maya Crocombe.

• 35 mins

Series 20

The Case of The Missing Gorilla

'How can I be immersed in a book, and still notice my name?' asks Charlotte.

• 37 mins

Series 20

The Wild and Windy Tale

鈥淗ow do winds start and why do they stop?鈥� asks Georgina from the Isle of Wight

• 38 mins

Series 20

The Suspicious Smell

Why do our bodies smell? And does our smell influence how much we like each other?

• 38 mins

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