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Space & Science

  Home > Space & Science

Stephen Hawking Says He Knows What Happened Before The Big Bang

At the time of the Big Bang, all the matter in the universe was smooshed into an incredibly hot, infinitely dense speck of matter.


 March 3rd, 2018  |  11:30 AM  |   631 views





What was there before there was anything? Stephen Hawking might know the answer. Credit: Shutterstock

But what happened before that? It turns out, famed physicist Stephen Hawking has an answer, which he gave in an interview with his almost-as-famous fellow scientist, Neil deGrasse Tyson. Hawking discusses these ideas and others on the series finale of Tyson's "StarTalk" TV show, which airs this Sunday (March 4) at 11 p.m. ET on the National Geographic Channel.


Hawking's answer to the question "What was there before there was anything?" relies on a theory known as the "no-boundary proposal."


"The boundary condition of the universe ... is that it has no boundary," Hawking told Tyson, according to Popular Science.


To understand the theory better, grab your universal remote (that is, your remote that controls the universe), and hit Rewind. As scientists know now, the universe is constantly expanding. As you move backward in time, then, the universe contracts. Rewind far enough (about 13.8 billion years), and the entire universe shrinks to the size of a single atom, Hawking said.


This subatomic ball of everything is known as the singularity (not to be confused with the technological singularity during which artificial intelligence will overtake humans). Inside this extremely small, massively dense speck of heat and energy, the laws of physics and time as we know them cease to function. Put another way, time as we understand it literally did not exist before the universe started to expand. Rather, the arrow of time shrinks infinitely as the universe becomes smaller and smaller, never reaching a clear starting point.


"Events before the Big Bang are simply not defined, because there's no way one could measure what happened at them," Hawking wrote in a lecture on the no-boundary proposal. "Since events before the Big Bang have no observational consequences, one may as well cut them out of the theory, and say that time began at the Big Bang."


This isn't the first time Hawking has discussed this theory. He previously delivered lectures on the topic and starred in a free documentary about it, available on YouTube. Tune into StarTalk on Sunday to hear Tyson and Hawking delve deeper on the subject, as well whether Isaac Newton would be more excited to learn about black holes or Tinder.



courtesy of SPACE

by Brandon Specktor


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