A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in time, before the Big Bang. Dark matter, then, could be right-handed ...

For scientists, that has long posed a problem: According to physicists’ best current theories, matter and its counterpart, ...

Is time something that flows — or just an illusion? Exploring space-time as either a fixed “block universe” or a dynamic fabric reveals deeper mysteries about existence, change, and the very nature of ...

A newly discovered set of mathematical equations describes how to turn any sequence of random events into a clock, scientists ...

You can journey to the ends of the earth in search of success,” 19th-century Baptist preacher Russell Conwell is said to have proclaimed, “but if you’re lucky, you will discover happiness in your own ...

Our understanding of cosmology hinges on how well we know our own local universe, which remains poorly mapped and poorly ...

If you think a galaxy is big, compare it to the size of the universe: it's just a tiny dot which, together with a huge number ...

It has been 10 years since the discovery of gravitational waves, which were eventually traced back to a merger of two black holes 1.3 billion years ago.