Month: January 2021

Physicists Study How Our Universe Might Have Bubbled Up in the Multiverse | Quanta Magazine

“The multiverse hypothesis sprang from efforts to understand our own universe’s birth. In the large-scale structure of the universe, theorists see signs of an explosive growth spurt during the cosmos’s infancy. In the early 1980s, as physicists investigated how space might have started — and stopped — inflating, an unsettling picture emerged. The researchers realized that while space may have stopped inflating here (in our bubble universe) and there (in other bubbles), quantum effects should continue to inflate most of space, an idea known as eternal inflation.”

https://www.vice.com/en/article/z3vq8x/scientists-think-the-multiverse-might-be-the-key-to-explaining-dark-matter

What’s more, the new study hints at the existence of a multiverse, in which our universe is just one of many in a broader and more complex structure. If there is an “outside” to our universe, then an external observer might see the entirety of everything we know—stars, galaxies, and billions of light years of space—as a puny primordial black hole.

“We still don’t know what dark matter is made of, but, since the black holes are known to exist, it is natural to ask whether dark matter could be composed of black holes that could form before the stars and galaxies formed,” said Alexander Kusenko, an astrophysicist at UCLA who led the new study, in an email.