Dr Susie Maidment, Dr Tori Herridge, and Dave Gorman discuss the advantages and disadvantages of large vs small organisms. They explore the evolution of size and extinction events, debunk misconceptions about dinosaur speed, talk about biases and challenges in finding dinosaur fossils, and delve into theories about the extinction of dinosaurs and 1970s fascination with giant creatures.

A History of RockBrian Cox and Robin Ince are joined by rock enthusiasts Ross Noble, Paleontologist Susie Maidment and Geologist Chris Jackson to look at the history of rock. Unfortunately for Ross, this turns out to mean actual rolling stones, rather than THE Rolling Stones. We hear what secrets the study of rock reveals about the very birth of our planet, to the incredible creatures that walked the Earth many millions of years ago, preserved in our ancient stones.Producer: Alexandra Feachem