Despite the great scientific progress achieved by humans during the last two centuries, the puzzles that must be left out of how to start life are still numerous and unlimited, and the questions still confused between the answers are much greater than those questions that led us to answer it curiosity and love of knowledge are the most characteristic Humans.
We want to know where we are from where and when, where we came from, how, where and where are we going? And perhaps trying to unravel all these puzzles is the primary pleasure of life, which makes man stick to his existence, keen on his safety and survival to the maximum extent possible; but where was the beginning?
The majority of scientists agree that the origin of the earth began about four thousand and six hundred million years ago, when when the Earth was a million years old, the simple forms of life appeared. Then the spread of countless shapes and types began. Is one cell and even the trees and the huge animals up to the master of objects and the most intelligent, which built civilizations and accumulated experiences and has a recorded history.
We are commanded to walk the earth to see how creation began? Where did the materials of life come from, how did the initial primary elements form and how were the molecules linked? And how they interacted together and turned into amino acids and proteins, which are the building blocks of life and how the particles from the simple state to a living cell independent amid the midst of this huge universe, live and multiply and breathe and defend itself. In the midst of the work of scholars, the path of the scholars and the multiplicity of paths and opinions and trends varied.
Some of them said:
That living organic molecules were created from inorganic molecules present in the Earth's atmosphere, some of them said: "They came from outer space, and there are those who said: 'They were made of hot fountains at the bottom of the oceans.'
What is life?
But the search for something requires to be aware of, to distinguish it, then what is life? Here are the scientists found themselves in front of another puzzle, the definition is difficult, but the escape from the situation said that there is something that distinguishes the living organism from what is not alive, reproduction, for example, any organism that gives birth to creatures like him and grow, but there is what multiples and grows and is not a living being, Fire, for example, and crystals.
So, to say that what distinguishes the organism is its ability to metabolize, ie, digesting the appropriate food and energy extraction necessary for life, and then evolution, the organism develops and does not prove on one case, and then the definition of life in this form is not simple things, how? So we know the origin of life, and here it was only scientists to develop theories and research and test what supports any of them.
Theories on how to start life
Currently there are two theories:
The first is that life originated from the materials and conditions that existed on Earth and the second that life came to Earth from outside, where the seeds of life found suitable conditions to grow and thrive. The authors of this theory argue that amino acids, the basis of life, existed when the earth was formed at the beginning of its creation.
The authors of the second theory, their Hajj proved the existence of amino acids m in the meteorites scattered in space and falling on the ground at night and day, and may be the origin of life was in the comets that fell on the ground out of time.
All this brings us to the pre-emergence of life on Earth, and we find only the theory of the Great Bang, which is still the theory of scientists, where the theory assumes that the creation of the universe began with a huge explosion from the point of infinite density and from which came into existence galaxies, stars , Planets and everything we see and what we do not see of the assets.
Thread is not over yet! Because questions about how to start life are endless!
Source: Scientific Reflections book by Dr. Osama Abu Halima.
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