33:T497,

What is life? Neil deGrasse Tyson and co-host Chuck Nice tackle assembly theory, artificial life, and the origin of lifeforms in the universe as we revise the definition of life with astrobiologist and theoretical physicist Sara Imari Walker.

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34:T512,

Today we’re going back to the beginning – no Romans, Celts, Egyptians or Macedonians in sight. We’re going much further back, covering billions of years of prehistory as we look at the emergence of life on Earth. From the rise of the earliest microscopic membranes to the arrival of the dinosaurs.

To talk through this massive topic, Tristan was joined by Henry Gee, a palaeontologist, evolutionary biologist and senior editor of the science journal Nature. Henry is also the author of a new book: A (Very) Short History of Life on Earth. Prepare to be blown away, as Henry expertly narrates you through several billion years of history in just under 90 minutes.

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Music:

The Beginning - Jessica Jones

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Origins: The meaning of “life”