Link to the Show / Show NotesOn this week's show, changing life - from the depths of evolutionary history to the depths of space. We'll hear about an ancient shrew-like creature that made the first step towards large mammalian brains and a modern rat, deemed extinct, who made a surprise re-appearance. Some scientists are sending creatures into space, while other's search for life that's already out there. And, a new study shows that negative gossip can change the way we see someone - literally.

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