Lisa Randall with Bill Nye the Science Guy on Dark Matter and the Dinosaurs

The first female theoretical physicist tenured at Harvard, Lisa Randall makes ideas like string theory and quantum mechanics accessible to the rest of us in bestselling books like Knocking on Heaven’s Door and Warped Passages.

Now, she’s onto something new: dark matter—and evidence of how it may be interacting with matter here on earth. For cosmologists, this is sensational. Bill Nye joins Randall to discuss the ideas in her new book, Dark Matter and the Dinosaurs.