Small shovel to move swiftly in the hands of researchers. They scraped a layer of ancient soil at the site Strelley Pool, the remote Pilbara region in Western Australia. Between quartz and sand, revealed the presence of micro-sized chunks of odd.
Some scientists think these chunks of rock is the result of the mineralization process. Other scientists interpret as fossil microbes when the earth was still a quarter of the age-old now.
Archaeologists excavated sediment is one of the oldest on earth. Layer was created at the time of the Archean eon kurunnya 3.8 billion to 2.5 billion years ago. David Wacey from the University of Western Australia including the scientists who participated in this debate. To test the two main theories that are triggered on both sides, he examined the odd chunk using microscopy and spectroscopy techniques.
On microscopy techniques, to sharpen the vision used an electron microscope. Measurements indicate the size of the chunk reaches ten or a dozen yards persejuta times thinner than a human hair thicker. The microscope also reveals a strange object in the form of tubes and random clustered.
Spectroscopic tests carried out to dissect the chemical composition of the material. The character of light passing through the object structure is very similar crystalline pyrite and iron-sulfur mixture.
"The shape and spreading more consistent with the bacteria," said Wacey. "Abortion can only be produced from the metabolism of sulfur and sulfate."
Age measurements of samples to prove that these bacteria 3.4 billion years old. This makes the fossil the oldest human ever found. Certainty is an odd chunk of fossilized microbes from the open perspective on life scientists in the era of the early Earth.
Earth in the Archean eon very extreme deemed unsuitable livable life. At that time, the earth's atmosphere had little oxygen. But the existence of organisms that prove that living things can survive without oxygen support.*** [MSNBC | LIVESCIENGE | ANTON WILLIAM | KORAN TEMPO 3630]
