We take a deep dive into toffee planets with The Planetary Guy, Dr. Paul Byrne, who helps us explore the myriad types of exoplanets that might be lurking out there, including some with eggshell crusts and toffee interiors. And gravitational waves have yielded another secret, confirming Stephen Hawking's Black Hole Area Theorem. Find out all about it, and black hole trivia, on WtG.