New research from theoretical physicists at the Perimeter Institute proposes that our universe may have emerged from a black hole in a higher-dimensional universe. The big bang poses a big question: if it was indeed the cataclysm that blasted our universe into existence 13.7 billion years ago, wh

Much remains unknown to scientists about the era immediately following the big bang, when the universe was hot, dense, and devoid of spiral galaxies like our modern Milky Way. Consequently, it's difficult to pin down when the first complex galaxies were born. But we're beginning to close this cosmic gap of empirical darkness.