"A newly discovered 450-million-year-old fossil arthropod was found entirely preserved in pyrite — aka fool’s gold."
From @popsci: "The newly named species Lomankus edgecombei boasts a leg coming out of its head called a 'great appendage' that likely helped this extinct spider-like creature live in a very hostile world."
The original study: https://www.cell.com/current-biology/fulltext/S0960-9822(24)01367-8?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982224013678%3Fshowall%3Dtrue