On Monday, August 21st residents of just 10 states —and the millions of travelers making the trip for the chance to see a rare phenomenon—will be able to witness the full totality of a solar eclipse. The totality window spans a mere 70 miles wide. Astronomer Bob Bermantouches on the spectacular beauty of a total eclipse compared to a partial eclipse.

Then we turn our attention to his latest book: “Zapped“.
Even during the darkest night sky, all around us we’re surrounded by light. Science writer Bob Berman joins us to talk about the many kinds of light we cannot see – how they are crucial for life and how they can kill us if we’re not careful.

His new book is called “Zapped: From Infrared to X-Rays, the Curious History of Invisible Light”