From biomarkers to actual preserved billions-of-years-old microorganisms, here are seven of the world's oldest fossils yet discovered.
These fossil discoveries suggest that life on Earth may have originated much earlier than previously thought, sparking scientific debate about their timeline.The history of life on Earth extends far beyond the dinosaurs and ancient mammals that usually come to mind when we think of fossils. Believe it or not, scientists have actually found signs of life from billions of years ago.that are older than some or all of the list entries may have been discovered since the time of writing.
Some may have found it. The graphite’s isotopic composition suggests that ancient microorganisms produced it, likely some of the earliest life forms on the planet. Next up on our list of the world’s oldest fossils is the Pilbara Craton Sulfide deposits in Western Australia. Dated to around 3.48 billion years ago, the presumed microfossils within them could be some of the oldest yet discovered.
For the uninitiated, microbial mats are layers of microorganisms that stick together, often forming complex and resilient ecosystems. They are still common structures today.
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