Fish fossil upends scientists’ view of jaw evolution – Nature

Dinghua Yang

A fossil fish found in Yunnan, China, has filled in a gaping hole in how researchers thought the vertebrate jaw evolved.

The 423-million-year-old specimen, dubbed Qilinyu rostrata, is part of an ancient group of armoured fish called placoderms. The fossil is the oldest ever found with a modern three-part jaw, which includes two bones in the upper jaw and one in the lower jaw. Researchers reported their find on 20 October in Science.

Read the full story in Nature.

This Hardcore Dinosaur Lived With a Painful Number of Serious Injuries

Image credit: Senter et al, PLOS One

Move over, T. rex: There’s a new toughest dinosaur in town. One specimen of Dilophosaurus (portrayed in Jurassic Park—inaccurately—as a venom-spitting dino with a neck frill) survived a record-breaking eight bone injuries in its front limbs and shoulder.

Read the full article in Mental Floss.