Society & Culture,
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ABC Radio National presents material from Big Ideas web and TV to bring you the best public talks, debates and lectures from Australia and around the world. One single audio file of the whole program - good for continuous listening.
September 20th, 2016
Episode 414 of 431 episodes
How can we know how many species preceded our own? Can we tell which of those species are our ancestors, and which are non-ancestral close relatives?
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