Can you catch cancer?

From Tasmanian devils to tapeworms, cancer can be contagious…

The best first word in Wordle…according to maths

Can we calculate the best opening word? Watch the video to find out!

Could treating ageing cause a population crisis?

The first in a series of videos on the ethics of treating ageing.

Did coronavirus leak from a lab?

My new video, featuring controversy, intrigue and RNA sequences…

Chaos! How Mars could smash into the Earth

Chaos theory, the future of the Solar System and the fate of the Earth…

How to do TEN TIMES more coronavirus tests, for free

‘Test pooling’ could transform coronavirus testing—so why is no-one doing it?

My favourite optical illusion

This optical illusion is so cool I just had to make a video about it.

How to see Comet NEOWISE

My new video on the beautiful, fleeting visitor to the inner Solar System.

Coronavirus: what the hell do we do now?

A transcript of my recent video about the what happens next with coronavirus—just in case 30 minutes of me talking isn’t for you!

Coronavirus: what happens next?

Check out my new video about how to beat COVID-19.