https://www.yahoo.com/news/scientists-found-520-million-old-174200867.html

A remarkable fossilized larva has been discovered by scientists with its brain and guts still intact.

The fossilized creature is one of the earliest ancestors of a group known as arthropods, which includes insects, crabs, and lobsters.

A unique window into the past, the ancient critter has allowed experts a chance to better understand evolutionary links between the arthropods of the past and those of the present day.

originally posted at https://stacker.news/items/942854