Deeply Hidden ThingsBig Idea 01
Gravity & Relativity
Why does everything fall?
With the air out of the way, everything falls the same, whatever it’s made of. The answer turns out to be that time runs slower near the ground — and that falling is going as straight as you can.
Discover
Why Does Everything Fall?
With the air out of the way, everything falls the same — whatever it is made of.
Go Deeper
The Straightest Path
Time runs slower down low, and the straightest path bends toward the slow side.
Use It
Falling Forever
Nothing is holding anything up. Orbiting is falling, and missing.