Astrophysicist Explains Gravity in 5 Levels of Difficulty | WIRED
Astrophysicist Janna Levin, PhD, is asked to explain the concept of gravity to 5 different people; a child, a teen, a college student, a grad student, and an expert. Levin is the Claire Tow Professor of Physics & Astronomy at Barnard College of Columbia University and author of “Black Hole Blues and Other Songs from … Read more