How Cosmic Collisions Have Shaped Our Solar System

15:59 minutes

From the rocky fragments in Saturn’s rings to Earth’s own moon, our solar system bears signs of an ancient demolition derby. Planetary scientist Erik Asphaug describes the role of impacts in our planetary neighborhood, and looks ahead to a possible comet collision on Mars.


Segment Guests

Erik Asphaug

Erik Asphaug is the Ronald Greeley Chair of Planetary Geology at the School of Earth and Space Exploration at Arizona State University in Tempe, Arizona.

Meet the Producer

About Charles Bergquist

As Science Friday’s director and senior producer, Charles Bergquist channels the chaos of a live production studio into something sounding like a radio program. Favorite topics include planetary sciences, chemistry, materials, and shiny things with blinking lights.