Dark matter, which makes up 80 percent of all matter in the universe, may have formed in the very short time before the big ...

We are the Universe trying to understand itself. How, and why, did we come to be? Why does the Universe take the shape it ...

Others took notice and named his theory "big bang." LeMaitre's ideas opened more questions, many of which forced physics and astronomy together: What was that primordial atom like? Why would it ...