Series 17

Back to The Sinister Hand

What determines left or right handedness? asks Neal Shepperson

• 29 mins

Series 17

More Frytful Scares

Why do people like to be scared? asks Heidi.

• 29 mins

Series 18

The Guiding Hound

How do guide dogs know where they're going?

• 39 mins

Series 18

The Weirdness of Water Part 1

‘Please explain the weirdness of water?’ asks Neil Morton in Stirling.

• 37 mins

Series 18

The Weirdness of Water Part 2

Adam Rutherford and Hannah Fry attempt to answer more questions on why water is weird.

• 40 mins

Series 18

The Painless Heart

Why does my heart not ache after exercise?

• 37 mins

Series 18

The Slippery Situation

'What is the most slippy thing in the world?' asks eight-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

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

“How does Wi-Fi work - is it magic?” asks Abby

• 34 mins

Series 19

Surprising Symmetries

We’ve 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?’ asks Maya Crocombe.

• 35 mins