Our motion perception is remarkably well tuned to detect small changes in speed and direction. For example, soccer goalkeepers need to precisely judge the speed, direction, and curvature of an ...

From Newton’s falling apple to Einstein’s curved spacetime, our understanding of gravity has come a long way, yet this familiar force remains one of the biggest puzzles in physics.

It’s been demonstrated since the 1500s that, when falling toward a certain body, objects fall at the same rate. Everyone from Galileo in Pisa to David Scott on the moon demonstrated that. But what if ...

Gravity is just gravity, right? You slip on some stairs, take a tumble to the bottom, and everyone laughs. Hilarious, that’s a given, but that’s also not giving gravity its due. Gravity is all around ...

With the international space station going up, and Russia’s Mir space station coming down, it’s a good time to “get down” about gravity. Understanding weightlessness is important not only for space ...

All objects in the absence of air resistance (friction) fall at the same rate regardless of their mass. Due to gravity the speed of an object dropped from rest from a height will increase at the rate ...

If you drop an object, it will fall. It's a motion that we’ve all seen hundreds of times. We’ve also all seen plenty of the moon, which makes one complete orbit around our planet every 27.3 days (as ...

While most of us have never had the opportunity to go into space, we all have the chance to dream about it and wonder what it would be like. Across a wide variety of science fiction shows, you can ...