The first sign of life on Earth could be bacteria
A recent discovery shows that bacteria have existed on Earth for 3.7 billion years ago, after 1 billion years since the Earth was formed.
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A recent discovery shows that bacteria have existed on Earth for 3.7 billion years ago, after 1 billion years since the Earth was formed.
Bacteria discovered originated nearly 3.5 billion years ago, the oldest fossil in the world, according to US experts.
Life on Earth dates back 3 billion years ago, when the first organisms developed the ability to absorb solar energy.
Scientists have discovered living bacteria fossils about 1.2 billion years ago in the lava block in the Scottish highlands.
American scientists affirmed that the trace found in the ALH84001 specimen is microscopic fossil, proving that life can travel across the universe on meteorites.
Life on Earth survived thanks to oxygen, but surprisingly a few billion years ago, when oxygen had not yet appeared, there were germs of bacteria living.