Many in the space community are very concerned about low-gravity, no-gravity and radiation for people living for long durations in space colonies on planets, moons, asteroids or orbital bases. These ...

Just three numbers—that’s all it takes to completely, unequivocally, 100 percent describe a black hole in general relativity. If I tell you the mass, electric charge, and spin (i.e., angular momentum) ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

For more than a century, gravity has been the stubborn outlier in physics, resisting every attempt to merge Einstein’s smooth ...