You may have heard people say that aboard the International Space Station (ISS) there's "zero gravity," but in fact, gravity is still very much present. The station orbits Earth at an altitude of ...

A Jim Lattis, director of the UW Space Place at the University of Wisconsin-Madison: There’s actually gravity pretty much everywhere. But why do we feel gravity more here on the surface of the Earth ...

As my arms lift from my sides, and the rest of my body follows suit toward the ceiling of a modified Boeing 727—next to scientists, astronauts, engineers and activists—I think, “How did I get here?” I ...