Dr. Michelle Thaller talks to Prof. Lisa Randall, a theoretical particle physicist at Harvard, about her new book, Dark Matter and the Dinosaurs: The Astounding Interconnectedness of the Universe. The scientists explore what caused the dinosaurs' extinction and the role dark matter plays in the universe and our world.

About the Show: Astronomer and host Michelle Thaller takes a look at the big questions of the cosmos and what the answers can reveal about life here on Earth. Produced by Lauren Ober. From podcast powerhouse PRX, with support from the Sloan Foundation.

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