Earliest Life Forms at Life

Earliest Life Forms. Updated december 4, 2019 19:38 +08; The earliest known life forms on earth are putative fossilized microorganisms found in hydrothermal vent precipitates, considered to be about 3.42 billion years old.

An alternative idea gaining increased traction amongst scientists is that a fall in the ocean’s oxygen levels could have caused the first mass extinction of. The first life may have developed in undersea alkaline vents, and was probably based on rna rather than dna. Microscopic one‐celled creatures that are 3.4 billion years old, have.

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What were some of the earliest forms of life? Prokaryotes were the earliest life forms, simple creatures that fed on carbon compounds that were accumulating in earth’s early oceans. Such life forms may have lived as early as 4.28 billion years ago, not long after the oceans were formed 4.41 billion years ago, and not long after the formation of the earth 4.54 billion years ago. Microscopic one‐celled creatures that are 3.4 billion years old, have.