In recent years, one of the most troubling puzzles in astrophysics has grown more urgent. Scientists have realized that the ...

Why matter dominates over antimatter in our universe has long been a major cosmic mystery to physicists. A new finding by the world's largest particle collider has revealed a clue.

also called the Great Pyramid - the largest of three main structures in Giza. What's more, the team used cosmic rays to locate the void and estimate its size through millions of tons of rock.

Until now, it was thought this process began about 500 million years after the Big Bang, according to Joris Witstok, an astronomer at the Cosmic Dawn Center in the University of Copenhagen ...

That makes it the largest void ever observed ... the matter density could be as much as 50% below the cosmic average. If our galaxy lies inside such a void, that could explain why local ...