Researchers have unearthed fossils of massive freshwater crayfish that once scuttled through the lakes of southern New ...

but the researchers have discovered that a tiny molar on the crayfish jaw can be preserved. This means fossil hunters around the world can now work out if crayfish existed in prehistoric ecosystems.

Crayfish bodies rarely fossilize, but the researchers have discovered that a tiny molar on the crayfish jaw can be preserved. This means fossil hunters around the world can now work out if crayfish ...