520-Million-Year-Old Fossil Reveals Early Arthropod Evolution

Exceptionally preserved larva offers unprecedented insight into the origins of insects, spiders, and crabs.

Researchers discovered a half-billion-year-old fossil named Youti yuanshi in China.
The fossil's internal anatomy, including its brain and circulatory system, is remarkably well-preserved.
Advanced X-ray techniques were used to generate detailed 3D images of the tiny larva.
This find provides crucial clues about the early development of arthropods.
The study highlights the fossil's significance in understanding the evolution of complex body structures.