Timeline of the Universe · event
Eukaryotes
12.0 billion years — 1.8 billion years ago · Life on Earth
- Temperature (K)
- 3.1
- When
- 12.0 billion years — 1.8 billion years ago
- Redshift
- z ≈ 0.14
- Era
- Life on Earth
- Seconds After Big Bang
- 378588489210000000
What Happened
One cell ends up inside another and neither digests the other. The guest becomes the mitochondrion and keeps its own genome, which is why the evidence survives. Everything larger than a microbe is descended from that one accident.
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