introduction Humanbeings are always looking for the origin of life on Earth. The biggest questionsconfused the scientists are where do we come from and why we are here? To findout the answer of these two questions, scientists study the history of life onearth by studying the fossil records, molecular records and geological records.In this report, whether the earliest evidence of life is convictive enough isgoing to be discussed in those three different records. Lastyear, two researchers report their investigation which claimed that they foundthe earliest life on earth. If this result is proved to be true, it will be thenewest record in the world.
Although, they spent a long time to find evidenceto prove their discovery, many experts remain sceptical. One of the voice isthat the discovery may be a fossilised substance and there is no clear evidenceshows that there were living origins in ancient time. Another reason is that itis hard to prove that these microfossils structures are of biological origin. Inthis report, a brief introduction about the report – “Evidence for early lifein earth’s oldest hydrothermal ventprecipitates” will be discussed and the reasons that thisevidence should not be the earliest one to approve life exist on earth willalso be discussed later.
The “Earliest” Evidence PhDDominic Papineu and his student Mattdodd Dood from the Department of EarthSciences at UCL published their discovery on UCL’s website. Those two researchersfrom UCL claimed that they found fossils of some of the earliest life on Earthin the banded iron-bearing rocks from northern Quebec, Canada, which isrepresented by tiny filaments, knobs and tubes. Microbial fossils thoseresearchers discovered are at least 3.77 billion to 4.28 billion years old.Perhaps, they will be the oldest fossilized microorganisms in the world, whichmeans that those microorganisms could be one of the oldest life forms on Earth.The fossilized microbial mats, which is called stromatolites, discovered by scientistin the rocks of Greenland in 2016 is considered to be the oldest fossils onEarth.
They have been proved to be formed 3.7 billion years ago. One ofthe paper’s lead author, Mattdodd, explained that their discovery approved thetheory – not long after the earth was formed, the origin of life was developedfrom the hydrothermal vent. Dominic Papineu said in the interviewof the interview of UCL that the earth is about 4.5 billion years old.
The oceanabout 4.4 billion years ago. If microbial fossils can prove to be born at about4.28 billion years ago, this does suggest the possibility of life after theocean is formed.
? https://youtu.be/rynHqD3Elow ? The study also found tiny filaments and hematite thin tubes withtwisted structures, some connected to the ends and branches. Some twistedfilaments are coated with nano-scale hematite. Hematite forms a slender tubularstructure around the filament. These microfossils were formed during the earlydiagenesis.
The study also found microscopic rosettes and particles composed ofminerals containing carbonate, apatite and graphite carbon. These geochemistry,mineralogy, petrology and sedimentological ecidence prove the origin of biology