Stink ever dominated the earth
If you stand on earth a few million years ago, you probably won't be able to live, because then the planet is a rotten planet.
Heterotrophic phenomenon of microorganisms causes the earth
stinking smell a few million years ago. (Photo: Livescience)
Martin Brasier, a professor of earth science at Oxford University in England, and his colleagues studied biochemical processes on Earth from 1.9 million years ago. By analyzing the fossils of a strain of bacteria, they found many anaerobic bacteria eating other types of bacteria - an act that biologists call "heterotrophes," Livescience reported.
Heterotrophic microorganisms cannot create nutrients themselves, so they have to eat other microorganisms to get nutrients. In contrast, autotrophs (plants) have the ability to synthesize food from sunlight or inorganic substances.
The team predicted that microorganisms began to annex each other from about 3.5 million years ago. In anaerobic environment (without oxygen), heterotrophic bacteria use sulfate gas and other oxidizing sulfur compounds in the process of metabolism and produce hydrogen sulfide gas (H 2 S), chemical odor like an egg.
A study in 2007 showed that purple probably covered the Earth a few million years ago because the bacterium emitted purple light.
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