The Secret Genius of Modern Life Series 1Episodes Available now

Trainer

6/6Hannah Fry visits eBay authentication, where they are waging war against fake trainers.

5/6Hannah Fry finds out how 1970s car crashes helped us to count our steps.

4/6Hannah Fry discovers why innovations in meat packing almost derailed the electric car.

3/6Hannah Fry delves into the inner workings of virtual assistants.

2/6Hannah Fry tucks into the tech behind food delivery apps.

1/6Hannah Fry takes a look at the bank card, the digital key to accessing cash.