Is There Any Other Intelligent Life On Earth?

Is There Any Other Intelligent Life In The Universe?

A living being like you or me usually has two elements:a set of instructions that tell the system how to keep going and how to reproduce itself, and a mechanism to carry out the instructions. In biology, these two parts are called genes and metabolism.
What we normally think of as 'life' is based on chains of carbon atoms, with few other atoms such as nitrogen or phosphorus. Carbon atoms should exist at all, with all the properties they have, requires a fine adjustment of physical constants such as the QCD scale, the electric charge and even the dimension of space and time. If these constants had a significantly different values , either the carbon atom would not be stable or electrons would collapse on the nucleus. For the Strong Anthropic Principle, one supposes that there are many different universes , each with different values of physical constant. That values allow the existence of the carbon atom which act as the building block of life.
There was no carbon when the universe  began in the Big Bang about 13.8 billion years ago . It was so hot that all the matter would have been formed in the form of protons and neutrons. About a minute after the Big Bang the temperature would have fallen about a billion degrees. If this all happened then all the matter in the universe would have ended up as the simplest element, hydrogen, whose nucleus consists of a single proton. However, some of the neutrons collided with protons and stuck together to form the next simplest element , helium, whose nucleus consists of two protons and two neutrons. But no heavier elements like carbon or oxygen, would have been formed in the early universe.
The universe continued to expand and cool. But some regions had slightly higher densities than others and the gravitational attraction of  the extra matter in those regions  slowed down their expansion, and eventually stopped it. Instead , they collapsed to form galaxies and stars, starting from about 2 billion year after the Big Bang. Some of the early stars would have been more massive than our Sun; they would have been more massive than our Sun; they would have been hotter than the Sun and would have burned the original hydrogen and helium into heavier elements, such as carbon, oxygen , and iron. This could have taken only a few hundred million years. After that, some of the stars exploded as supernovae and scattered the heavy elements back into space ,to form the raw material for later generation of stars.
There are four types of nitrogenous bases- adenine, cytosine , guanine , and thymine. An adenine on one chain is always matched with thymine on the other chain and a guanine with cytosine. This forms the chains of the DNA. But we still don't know how DNA first appeared on Earth.
It is very difficult for one to say about lives in the other universes.
Thank you everyone hope you like it.😊

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