500 million year old insect-like fossils have amazingly well-preserved nervous systems

Two tiny craters, each smaller than an aspirin pill, contain fossilized nerve tissue dating back 508 million years. The Cambrian insect-like creatures could help scientists piece together the evolutionary history of modern-day spiders and scorpions.

However, it is not clear exactly where these fossils are – both types symmetrical soft wood That fits right into the arthropod evolution tree, said Nicholas Strausfeld, a trustee professor in the Department of Neuroscience at the University of Arizona, who was not involved in the study.

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