Series 15

A Cold Case Part 1

Why do we get more colds in winter?

• 34 mins

Series 15

A Cold Case Part 2

From cold feet to cold water swimming, Rutherford and Fry answer your chilling questions

• 34 mins

Series 15

The Exotic Wormhole

What are wormholes and do they really exist?

• 37 mins

Series 16

The Growling Stomach

Why do our tummies rumble - and when they do, does it always mean we are hungry?

• 34 mins

Series 16

The Seeded Cloud

Can we make it rain?

• 33 mins

Series 16

The Sting in the Tail

What’s the point of wasps? Science sleuths Drs Rutherford and Fry investigate

• 42 mins

Series 16

The End of Everything

When and how is the universe going to end?

• 44 mins

Series 16

The Zedonk Problem

What are ligons and tigers? What is a species?

• 40 mins

Series 16

The Space Burrito

Is there a point in space where the Sun could heat a burrito perfectly? And other puzzles.

• 34 mins

Series 17

The Hamster Power Hypothesis

How many hamsters on wheels would it take to power London?

• 38 mins

Series 17

The Martian Mission

What would it take for humans to live on Mars? Drs Rutherford and Fry investigate.

• 42 mins

Series 17

The Good and Bad in Fungi

"Why are some fungi helpful and others harmful?" asks Paul Glaister in Reading.

• 48 mins

Series 17

The Pizza Diet

Can I make a pizza that contains my recommended daily intake of everything? asks Paul

• 42 mins

Series 17

The Noises That Make Us Cringe

Why do some people find noises like a fork scraping a plate so terrible?

• 48 mins

Series 17

The Scientific Exploration of Astrology

Could there be something to astrology? asks Dan in Australia

• 50 mins

Series 17

The Mosquito Conundrum

What’s the point of mosquitoes? asks Cathy

• 45 mins

Series 17

The Flying Clock and the Stopped Watch

Do individuals perceive time differently? asks Joe from North Yorkshire

• 50 mins

Series 17

A Weighty Matter Part 1

How does gravity pull us? asks Emma

• 43 mins

Series 17

A Weighty Matter Part 2/2

Is dark matter a fudge to fit existing theories to inexplicable observations?

• 40 mins

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?

• 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 1/2

Please explain the weirdness of water? Drs Rutherford and Fry investigate.

• 37 mins

Series 18

The Weirdness of Water Part 2/2

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? Drs Rutherford and Fry investigate

• 37 mins

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

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