Earliest known life form, Prehistoric evidence site in Pilbara region, Australia
This site lies within the Dresser Formation and preserves tiny traces in geyserite rock, pointing to microbial communities from 3.48 billion years ago. The rocks stretch through dry hills and red plains, where weathered layers reveal the oldest evidence of life on land.
Researchers discovered vertical palisade structures and fossilized bubble forms in the rock, showing bacterial activity in hot springs. The discovery changed understanding of when and where life on dry land first appeared.
Scientists from around the world come here to study the microscopic traces that show how life on Earth began. Geologists and biologists often spend weeks in the remote landscape, sharing their discoveries with research institutes across several continents.
The site sits in a remote area where the sun beats down intensely and shade is rare. Those who travel here should come early in the morning or late in the afternoon, when the heat subsides and the light illuminates the red rocks more gently.
The structures here show that life began not in the ocean but in hot springs on land. This discovery shifts the origin of life from underwater environments to steaming geysers that brought water and minerals to the surface.
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