Try balancing a baseball bat on your hand. With some experimenting, you'll find that the bat stays up longer if you put the heavy end up. Why?
How tiny stones inside our heads tell us which way is up...
Learn about gravity, stars, and really big lumps on this Moment of Science.
Why don't the cornflakes at the bottom of the box get crushed by the weight of the flakes on top?
Why are the planets where they are instead of somewhere else?
Nowadays everybody knows there are nine planets in our solar system, but that information was hard won.
A skydiver's body is in a delicate balance. Gravity tugs her downward with a constant, relentless force, while air resistance pushes her upward.
Every skydiver experiences two different forces: the tug of gravity and the upward push of air resistance.
When a kicker kicks the football down field, what is he calculating?