In 1964, physicists Arno Penzias and Robert Wilson were setting up ultra-sensitive microwave receivers for radio astronomy observations at Bell Labs in Holmdel, New Jersey.
No matter what the two did, they couldn’t get rid of the radio noise in the background, which seemed to come from everywhere at once. Robert Dicke, a physicist at Princeton University, told Penzias that the radio noise could be cosmic microwave background radiation (CMB), which is microwave radiation that has been around since the beginning of the universe.
And that’s the story of how CMB was found. Easy and beautiful.
Penzias and Wilson won the Nobel Prize in Physics in 1978 for what they found, and they should have. Their work opened a new era in cosmology, giving scientists new ways to study and learn about the universe.
Scientists just changed the way they usually think about solar flares.
Yet, this discovery also led to one of the most surprising discoveries in recent history: unique features in the CMB could be the first direct proof of the multiverse, which is the idea that there are an infinite number of worlds and alien people beyond the known universe.
But in order to fully understand this incredible claim, we need to go back to the beginning of space and time.
How the universe came to be
According to the most popular theory about how our universe came to be, the first few hundred thousand years after the Big Bang were filled with a plasma made of nuclei, electrons, and photons that was so hot that it scattered light.