Scottish paleobiologist Dr Thomas Halliday joins Amy for an in-depth conversation about his debut book, Otherlands: A World in the Making. Thomas takes us on a journey into deep time and introduces us to the awe-inducing ecosystems, animals, plants, and places that existed – from Alaska during the Pleistocene (20,000 years ago) to Australia during the Ediacaran (550 million years ago).

Thomas is an Honorary Research Fellow, Department of Earth Sciences, University of Birmingham. His PhD won the Linnean Society Medal for the best thesis in the biological sciences in the UK.