Your head will spin after reading what Stephen Hawking thought about the multiverse!


High-Energy Physics released Hawking's final article, which revisited one of his earlier (and equally astounding) hypotheses. Einstein's theory that the universe before the Big Bang was a singularity—a remarkably dense and hot micro-speck of matter where the laws of physics were suspended—is taken into consideration by the "no-boundary idea." In this singularity, which had no beginning or end and was unending and spherical rather than finite and linear, Hawking proposed that time as we know it did not exist. The early cosmos is thought to have rapidly expanded and produced parallel universes during a time known as cosmic inflation.

Hawking eventually felt compelled to measure something that is so beyond the capacity of the human mind. Paradoxically, this implies that there can be no reliable way to verify theories regarding the beginnings of our own universe or its destiny. Unlimited universes create gateways to infinite possibilities. He and physicist Thomas Hertog set out to separate every distinct sort of universe that might be floating around in the universe in order to place theoretical limits on his own no-boundary hypothesis.

Could the cosmic microwave background conceal evidence of the multiverse? Source: ESA

Hertog, who wrote that study with Hawking, told Live Science that Hawking was dissatisfied with the current situation. "He said to me a year ago, "Let's try to control the multiverse. Therefore, we started working on a strategy to turn the concept of a multiverse into a logical, testable scientific framework.

In the end, Hawking and Hertog employed holography, the idea of encrypting three-dimensional information on a two-dimensional surface, to make a connection between Einstein's theoretical singularity and our cosmos, which they said emerged from it. Some scientists think the universe is a hologram. They were able to harmonise the bizarre quantum physics of the singularity with the classical physics equations that explain how the cosmos behaves. The nature of those universes can be predicted because we know there are a finite number of universes in the multiverse.

Before we can demonstrate that other worlds exist somewhere in time and space, we still need proof of a multiverse. Cold microwave radiation known as the cosmic microwave background comprises remnants of the first gravitational waves that occurred at the Big Bang (CMB).

It might prove that the multiverse is a real phenomenon if a high-tech satellite ever sends back a CMB energy signature that agrees with Hawking's theory of cosmic inflation. Even though more investigation is required to confirm Hawking and Hertog's notion, the idea of existing as a life form on one of many worlds is enough to keep you up at night.

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