Timeline of the Universe · event
Life Leaves Its First Trace
10.3 billion years — 3.5 billion years ago · Life on Earth
- Temperature (K)
- 3.5
- When
- 10.3 billion years — 3.5 billion years ago
- Redshift
- z ≈ 0.3
- Era
- Life on Earth
- Seconds After Big Bang
- 324941708210000000
What Happened
Stromatolites in the Pilbara: layered mats built by microbes that were already doing chemistry. Carbon-isotope ratios in Greenland push the first sign back to 3.7 billion years and disputed structures further still, which is the honest state of it — life is older than the oldest thing anyone can hold up as proof of it.
Open on the Timeline of the Universe shelf — the interactive card, the filters, and everything alongside it.