Gravity may seem constant, but it actually varies across the planet—and one of the strangest places is Antarctica, where gravity is slightly weaker than expected. Scientists have traced this “gravity ...

A fresh black hole merger detection has offered the clearest evidence yet for Einstein’s relativity and Hawking’s predictions. Scientists tracked the complete cosmic collision, confirming that black ...

In a galaxy 4.4 billion light-years away, scientists may have discovered the most massive pair of black holes ever found. Together, the behemoths have an estimated mass 60 billion times that of our ...