Did time exist before the Big Bang?

According to a straightforward interpretation of general relativity, the Big Bang wasn’t the start of ‘everything’.

Taking Einstein’s famous equations at face value and making as few assumptions as possible, a team of researchers has rewound the clock on our Universe to find it wouldn’t lead to a stopping point at all, but would take us through a different kind of beginning into a flipped space.

To understand what all the fuss over the Big Bang is, we need to rewind a bit to understand why physicists think it may not have been the start of everything.

Around 90 years ago, a Belgian astronomer named Georges Lemaître proposed that observed changes in the shifting of light from distant galaxies implied the Universe is expanding. If it’s getting bigger, it stands that it used to be smaller.