Two newly identified dinosaurs donned weird horns

Grooves, spiky shield not previously seen in Triceratops relatives

Machairoceratops cronusi and Spiclypeus shipporum

DOUBLE TROUBLE  Researchers have discovered two new species of dinosaurs with unusual horns. 

Mark Witton; Mike Skrepnick

Two newly discovered Triceratops relatives sported some peculiar headgear.

Researchers uncovered skull fragments of Machairoceratops cronusi in 77-million-year-old mudstone from the Wahweap Formation in southern Utah.