The revolution in speed ground to a halt in the 1960s. The previous half century saw great leaps in how quickly people could get from place to place: high-speed railways, cars, intercontinental flight. In our life time transport may have become safer and comfier — but we aren't getting anywhere any faster.

How did these great leaps happen? What grove this focus on transport innovation and where does collaboration come in to play? And why has the focus shifted?

This episode, we talk to Matt Ridley, author of How Innovation Works, about the acceleration of transport innovation from the steam engine to space travel.