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The earliest direct evidence of life on Earth are microfossils of microorganisms permineralized in 3.465-billion-year-old Australian Apex chert rocks.
Keeping this in consideration, what was the first form of life on Earth?
Stromatolites, like those found in the World Heritage Area of Shark Bay, Western Australia, may contain cyanobacteria, which were most likely Earth's first photosynthetic organisms. The earliest evidence for life on Earth arises among the oldest rocks still preserved on the planet.
Similarly, how did the first life form?
The earliest known life-forms on Earth are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 billion years ago, relatively soon after the oceans formed 4.41 billion years ago, and not long after the formation of the Earth 4.54 billion years ago.
Together we represent less than 1 percent of all the species that have ever lived since Life first appeared on Earth 3.8 billion years ago. There's no guarantee that we, or any of the other species around us, will remain.