Jim Hutchinson, 78, travels to Des Moines, Iowa this month to compete in the largest multi-sport event in the world for athletes aged 50 and over.

Neil deGrasse Tyson explains how Newton saw gravity as a force, while Einstein revealed it as warped space-time. A clear, ...

In particular it turns on what it means to be “subject to the jurisdiction” of the United States. The Trump administration ...

T-symmetry offers insights into the nature of time, revealing how fundamental physical laws remain invariant under time ...