Prof Sue Hartley comes into the studio to discuss the battle between flora and flora. Sue is an ecologist at the University of Sussex specialising in the study of plant-animal interactions and will be presenting The 300 Million Year War: this year's Royal Institution Christmas lectures.
This holiday season spare a thought for those who can't be with their loved ones ... especially those who are not even on this planet. Gregory Vogt, one of the authors of The Astronaut's Cookbook, tells us how to eat like a spaceman or woman.
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