Even Gila monsters need a chance to cool off from Arizona's brutal summer heat. One of Arizona's famous venomous lizards was ...

A 34-year-old Colorado man has died earlier this month after officials say he was bitten by his pet gila monster in a very rare occurrence. Ted S. Warren, Associated Press ...

Plus Gila monsters lay eggs underground. Until this point, the team mostly relied on anecdotal evidence about the timing of young Gila monster behavior, Moeller said.

Bolg would have been a bit of a monster to our eyes. "Three feet tip to tail, maybe even bigger than that, depending on the length of the tail and torso," said Woolley.

These lizards, whose modern representatives include the Gila monster, have an evolutionary history dating back over 100 million years. However, their fossil record is fragmentary, making each new ...

“Discovering a new species of lizard that is an ancestor of modern Gila monsters is pretty cool in and of itself, but what's particularly exciting is what it tells us about the unique ...

Woolley knew that a new species of monstersaur called for an appropriate name from an iconic monster creator, Tolkien. “ Bolg is a great sounding name.

Size comparison of the holotype specimen of Bolg amondol and a modern Gila monster (Heloderma suspectum, right). Gold: preserved skeletal elements.

A newly identified armored monstersaurian lizard roamed Grand Staircase-Escalante National Monument in Utah during the Age of Dinosaurs. About the size of a raccoon, this large lizard was an ancestor ...

Size comparison of the holotype specimen of Bolg amondol (UMNH VP 16266, left, Natural History Museum of Utah / Bureau of Land Management) and a modern Gila monster (Heloderma suspectum, right ...