Space travel has always hit a wall with slow speeds and massive fuel needs. Gravitic propulsion systems offer a game-c ...

You, too, could experience the same effects without going into space, and no, we're not talking about a zero gravity chamber ...

Narrator: Without gravity working on your body ... And, because it doesn't take much effort to float through space, your muscles lose strength and endurance pretty quickly. Reisman: You have ...

Without the strong pull of Earth's gravity, spinal vertebrae can expand or "unload" leading to a slight change of height. But research shows that once back on Earth, astronaut's heights go back to ...