This week Greg tells Maren about shovel-faced reptiles, giant ferns, land bridges, and classified war-time research. This is the story of how we worked out what shaped - and shapes - our planet. The story of an idea that's said to be as big a deal to Earth Sciences as Darwin’s Theory of Evolution is to the Life Sciences. Yet the idea was ignored for 50 years...  Show notes, sources, and transcript can be found at https://linktr.ee/surprisinglybrilliant Learn more about your ad choices. Visit megaphone.fm/adchoices