Scientists outlined that alien life in the universe may give much more information than thought. They made this statement after analyzing the oldest known fossil microorganisms which showed that the life on the earth begin 3.5 million years ago.
Scientists from the University of Wisconsin-Madison in the U.S. and University of California, Los Angeles discovered that two of the species they analyzed underwent a primitive form of photosynthesis. Another species generated methane gas. While two other species consumed methane gas and utilized it to construct their cell walls.
“By 3.465 billion years ago, life was already diverse on Earth; that’s clear – primitive photosynthesizers, methane producers, methane users,” said J William Schopf, professor at UCLA. “These are the first data that show the very diverse organisms at that time in Earth’s history, and our previous research has shown that there were sulfur users 3.4 billion years ago as well.”
Researchers analyzed microorganisms using secondary ion mass spectroscopy (SIMS). This technique offers the ratio of carbon-12 to carbon-13 isotopes, which would help scientists to determine how the microorganisms lived.
Scientists revealed that fossils were formed when there was very low oxygen in the atmosphere. The presence of oxygen would have been poisonous to these fossils and might have killed them.
Primitive photosynthesis occurs rarely on the earth because it exists where there is light but no oxygen. The study strongly show that primitive life forms were present throughout the universe.
Scientists revealed that life on the earth began quickly to form and there is a strong probability that it also began on other places in the universe.