Claudine Gay resigned after backlash to her testimony at a congressional hearing where she was criticized for not doing enough to tackle antisemitism on campus. She also faced accusations of plagiarism. Gay’s supporters, however, said her ouster reflects a system that wasn’t built for people of color.

The court's conservative majority overturned admissions plans at Harvard and the University of North Carolina, the nation's oldest private and public colleges, respectively.

Dark matter: we can't see it, but it's believed to make up 85 percent of all matter in the universe and without it we almost certainly wouldn't be here. Particle physicist and New York Times bestselling author Lisa Randall joins us to discuss her new book "Dark Matter and the Dinosaurs: The Astounding Interconnectedness of the Universe."