Watch Stephen Hawking casually explain what existed before the Big Bang

Around 13.7 billion years ago, our universe sprang into existence, but what was around before the Big Bang?

In a new episode of Star Talk, renowned physicist Stephen Hawking sat down with host Neil deGrasse Tyson to talk about what exactly pre-dated the beginning of our universe.


Hawking’s answer put simply? Nothing.

But just because an answer can be summed up in one word, does not mean it’s uncomplicated. Lucky for us, Hawking is one of the best science communicators in the world.

In his interview with Tyson, Hawking used the shape of the Earth as an analogy for the curved shape of the space-time continuum.

“According to Einstein’s general theory of relativity, space and time come together for a space-time continuum…which is not flat but curved by the matter and energy in it,” said Hawking.

To explain further, Hawking used the Euclidean approach to quantum gravity. In the Euclidean approach, ordinary real time is replaced by imaginary time, which behaves like a fourth dimension.

“In the Euclidean approach, the history of the universe in imaginary time is a four-dimensional curved surface like the surface of the Earth, but with two more dimensions,” said Hawking.

So wait – six dimensions in total? What exactly does that mean?

Hawking said he believes the universe has no boundaries. In other words, the Euclidean space-time continuum is a closed surface without end, kind of like the surface of the Earth.


“One can regard ordinary and real time as beginning at the South Pole, which is a smooth point of space-time where the normal laws of physics hold,” said Hawking.

“There is nothing south of the South Pole, so there was nothing around before the Big Bang.”

Just like there is nothing south of a southernmost point, time can’t exist before the Big Bang. Instead, time and space expand and spread outward from this singular point in time, like the degrees of latitude on planet Earth.

Mind = blown.

Science As Fact is our sister site where we cover politics, debunking, fact checking, and humour. If you want more like this, head over to Science As Fact.


Source link

Products You May Like

Articles You May Like

China’s Nuclear Fusion Machine Just Smashed Temperature Records by Getting 6 Times Hotter Than The Sun
China Has Changed Its Mind on Legalising Tiger And Rhino Part Trade After International Outcry
The Brightest Known Galaxy in The Universe Has Turned Out to Have a Really Dirty Secret
Furry Moths Have Evolved Impressive ‘Acoustic Camouflage’ on Par With Military Technology
This Insane Device Both Harvests Solar Energy And Sends Excess Heat Into Space

Leave a Reply

Your email address will not be published. Required fields are marked *