Episode 32: How to build a planet with Dr Kretke

Dr. Katherine Kretke  investigates how planets are formed with computer models. Her new research had a surprising result— that pebbles play a key role in forming terrestrial planets like Earth and Mars. Image: artist's conception of planetary formation (NASA/JPL-Caltech).

Dr. Katherine Kretke investigates how planets are formed with computer models. Her new research had a surprising result— that pebbles play a key role in forming terrestrial planets like Earth and Mars. Image: artist's conception of planetary formation (NASA/JPL-Caltech).