Do We Live in a Multiverse?

Though our universe might be infinite, the observable universe is finite. Perhaps, our universe may be just one minuscule region in a larger multiverse. If that's the case, do we really live in one?

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Chapters:
0:00 Introduction
0:56 Uniqueness
2:13 Where the idea came from
3:25 Dark energy
5:30 String theory

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(SCRIPT)

The concept of the #Multiverse, the concept of alternative universes.
That there’s one universe and within it are subverses, or multiverses.

Well you heard that right. The multiverse. One of the most baffling questions in astrophysics is "are we really a part of infinite universes?"

The #BigBang happened 13.8 billion years ago, and the speed of light is constant, as far as we know it. Even though the universe might be infinite, the observable universe is finite. So perhaps, our universe may be just one minuscule region, in a larger multiverse. So let’s take a look at this amazing theory of multiverse, and do we really live in one?

1. Uniqueness
Before we go any deeper, let’s talk about the concept of uniqueness. Uniqueness is one of those ideas that is unquestionable. There are very low chances of something being identical to it. Just like your fingerprints. But in a very recent picture of the cosmos, which says nothing is unique, the very notion of uniqueness is being challenged. It says that there might be duplicates of everything. Not only of objects but of me, you, everyone and everything else. And if it’s right, why haven’t we seen them? And where are they?

There was a time when the idea of a multiverse seemed impossible. But in recent years, scientists have discovered some compelling evidence of other universes. Some being born all the time. They might look identical to ours, having the same star and even the same planets. They might also have our duplicates, very identical to us. Except for the slightest details.
In another universe, it might be possible that we would be dying or being born. We could be getting married. Or perhaps, we could even be the president of the United States. Of course, not us per se, but our identical selves. But how is it possible? Doesn’t this idea seem absurd? Let us take a look at why this idea is compelling, not only to us but also to the scientists.

2. Where the idea came from
First let’s talk about where this idea of the multiverse came from. We all know about the Big Bang theory. It tells us about the massive explosion.. that led to the formation of our universe. But the Big Bang misses one thing, it doesn’t tell us anything about the bang. What caused the bang? And how it banged?

As a matter of fact, our universe has been expanding since the Big Bang. Which means that everything is moving away from each other, because the space between them is expanding.

In 1979, Alan Guth was studying the particles in the early universe. He observed that in the early universe, under the violent and harsh environments, gravity can be repulsive. The repulsive gravity would drive apart everything around and repel it, causing a massive expansion. This force was so powerful that it could take a molecule, and blow it up to the size of a Galaxy, in less than a billionth of a billionth of a blink of an eye. This idea gave birth to the theory of inflation. Then, the theory of multiverse gained unexpected support from two major areas of modern science, and these may be the key to understanding the many important phenomenons, in our universe and beyond.

3. Dark energy
In the twentieth century, astronomers believed that the universe might be shrinking, or might be slowing down. The analogy is like when you throw a ball up in the air, it comes back to you after some time. Astronomers believed that the universe was expanding and thought it would slow down. Because of the gravitational pull of the stars and galaxies.

But when detailed observations were made, especially by Edwin Hubble, astronomers observed that the universe was not slowing down. Instead it was accelerating outwards. Everything was moving away from each other at an increasing speed. Scientists believed there had to be an invisible force behind this. Astronomers called it dark energy.

#DarkEnergy is one of the most important discoveries in astrophysics. However, there was another aspect of this strange force. Its strength. Scientists believed that at quantum level, the amount of energy that would be generated is gigantic.

Видео Do We Live in a Multiverse? канала Beeyond Ideas