Comment: And that's probably a conservative estimate...
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RT
The researchers were
looking at pieces of the mineral zircon, in Western Australia. After
taking the samples back to the lab, they found a ‘chemo-fossil’ or a
certain mix of carbon isotopes, a study in the journal Proceedings of
the National Academy of Sciences stated.
Think of it as "the gooey remains of biotic life or anything more complicated," said study co-author Mark Harrison, a UCLA geochemistry professor, as cited by AP.
They were able to determine this because carbon has different weights. The carbon residue in the pieces of zircon had a greater percentage of lighter carbon, which scientists usually manage to find in remnants of life, just as if your finger decayed, Harrison said.
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Scientists believe that life may have existed 300 million years
earlier on Earth than previously thought. They analyzed data from tiny
pieces of a mineral in Australia and managed to date them back to when
the planet was just 400 million years old.
Think of it as "the gooey remains of biotic life or anything more complicated," said study co-author Mark Harrison, a UCLA geochemistry professor, as cited by AP.
They were able to determine this because carbon has different weights. The carbon residue in the pieces of zircon had a greater percentage of lighter carbon, which scientists usually manage to find in remnants of life, just as if your finger decayed, Harrison said.
Read more
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