Why can't anything travel faster than the speed of light? Do black holes really suck? And why is the universe expanding? These are just a few of the questions author and astrophysicist Jeffrey Bennett ...

Many theories are rock-solid: Scientists have just as much confidence in the theories of relativity, quantum mechanics, evolution, plate tectonics, and thermodynamics as they do in the statement that ...

Einstein's theory of relativity, first formulated in 1905, offers a profound explanation of the behavior of objects in space and time. While its applications are often associated with phenomena like ...

As new and powerful telescopes gather fresh data about the universe, they reveal the limits of older theories like Einstein's relativity. When you purchase through links on our site, we may earn an ...

WASHINGTON - An idea conceived when Dwight Eisenhower was president finally soared into orbit Tuesday when NASA launched a satellite designed to test parts of Albert Einstein's theory of relativity.