Did the life on Earth exist 4 Billion years ago?
A new controversies study shifts the time of the existence of the first forms of life on Earth at 500 million years ago.
In Labrador, north of Canada, there are some of Earth’s oldest cliffs, relatively 4 billion years ago. There are very few places on the planet that preserve such primitive rocks because the geological events, that occurred in time as the tectonism of the plates has transformed or erased the traces of the past.
It seems that in the Canadian cliffs is hides an answer that all the biologists, paleontologists, and many others don’t have.
Did the life on Earth exist 4 Billion years ago? When did it begin?
3.95 billion years ago, claims a new search.
We know that the first organisms on Earth cannot be stored in fossil forms because they are too small and delicate. So finding a response to the big question requires that very simple life forms may have left behind something like the substance produced during their activity. Following this runway, it was found that life on Earth existed 3.7 billion years. This was thought to be the right answer, as the planet is 4.5 billion years old. About 3.9 billion years ago the planet suffered a bombardment of asteroids and comets. This is known as late bombardment. Tokyo’s University research on some Canadian minerals shifts the existence of forms of life beyond, at 3.95 billion years. It is about existence not about the origin, moreover for an unknown Earth, covered with lava and asteroid rains. The study is focused on graphite (pencil material) found on Canadian rocks.
Graphite is carbon, the basic element of life. Each laboratory can determine whether a carbon sample is a production of living organisms. This means if it is biogenic or has come from geological processes. The analysis is carried out on the isotopes of the element, ie on atoms having an equal number of protons but varying the number of neutrons. Usually, biogenic carbon has a different number of neutrons. It holds a large number of small neutron isotopes. This is not a simple process of searching. This is the way we use it to look for life traces on other planets starting from Mars.
The study found that the carbon of 3.95 billion years ago was of organic origin, so in that period there was life on Earth.
Previous studies had found traces of organic life that amounted to 3.85 billion years ago. These were strongly opposed by researchers. In this case, – states Komiyra: – are very safe. At the moment we can not say which organism could have produced this type of graphite. We will analyze the isotopes of other elements like nitrogen, sulfur, and iron and maybe help us identify them.
Opposing the results was expected. Methods and conclusions are being analyzed by independent researchers, not involved in the research. If the evidence does not convince the scientific community we will have to acknowledge the fact that there is no new answer, even if there is one we are unable to find it.