beings are always looking for the origin of life on Earth. The biggest questions
confused the scientists are where do we come from and why we are here? To find
out the answer of these two questions, scientists study the history of life on
earth by studying the fossil records, molecular records and geological records.
In this report, whether the earliest evidence of life is convictive enough is
going to be discussed in those three different records.
year, two researchers report their investigation which claimed that they found
the earliest life on earth. If this result is proved to be true, it will be the
newest record in the world. Although, they spent a long time to find evidence
to prove their discovery, many experts remain sceptical. One of the voice is
that the discovery may be a fossilised substance and there is no clear evidence
shows that there were living origins in ancient time. Another reason is that it
is hard to prove that these microfossils structures are of biological origin.
this report, a brief introduction about the report – “Evidence for early life
in earth’s oldest hydrothermal vent
precipitates” will be discussed and the reasons that this
evidence should not be the earliest one to approve life exist on earth will
also be discussed later.
The “Earliest” Evidence
Dominic Papineu and his student Mattdodd Dood from the Department of Earth
Sciences at UCL published their discovery on UCL’s website. Those two researchers
from UCL claimed that they found fossils of some of the earliest life on Earth
in the banded iron-bearing rocks from northern Quebec, Canada, which is
represented by tiny filaments, knobs and tubes. Microbial fossils those
researchers discovered are at least 3.77 billion to 4.28 billion years old.
Perhaps, they will be the oldest fossilized microorganisms in the world, which
means that those microorganisms could be one of the oldest life forms on Earth.
The fossilized microbial mats, which is called stromatolites, discovered by scientist
in the rocks of Greenland in 2016 is considered to be the oldest fossils on
Earth. They have been proved to be formed 3.7 billion years ago.
the paper’s lead author, Mattdodd, explained that their discovery approved the
theory – not long after the earth was formed, the origin of life was developed
from the hydrothermal vent. Dominic Papineu said in the interview
of the interview of UCL that the earth is about 4.5 billion years old. The ocean
about 4.4 billion years ago. If microbial fossils can prove to be born at about
4.28 billion years ago, this does suggest the possibility of life after the
ocean is formed.? https://youtu.be/rynHqD3Elow ?
The study also found tiny filaments and hematite thin tubes with
twisted structures, some connected to the ends and branches. Some twisted
filaments are coated with nano-scale hematite. Hematite forms a slender tubular
structure around the filament. These microfossils were formed during the early
diagenesis. The study also found microscopic rosettes and particles composed of
minerals containing carbonate, apatite and graphite carbon. These geochemistry,
mineralogy, petrology and sedimentological ecidence prove the origin of biology