The Secret Genius of Modern Life - Season 1 Episode 2 -

Hannah Fry tucks into the tech behind food delivery apps like Deliveroo and Just Eat, which are now used by 24 million people in the UK.Hannah meets the R&D team behind food delivery titan Deliveroo, finds out how pensioners ordering Greggs revolutionised food delivery, and discovers how pizza made us fall in love with the internet in the 1990s.