Nothing quite fits the moniker “gentle giant” more than sauropods. These gargantuan dinosaurs could reach up to 123 feet long and weigh up to seven tons. Sauropods have long been believed to be herbivores, munching on leaves during the Jurassic and Cretaceous periods.

It’s the smoking gun, or the steaming guts,” said a paleontologist from a team that also found that the sauropods didn’t chew their food.

Plant fossils found in the abdomen of a sauropod support the long-standing hypothesis that these dinosaurs were herbivores, finds a study published in Current Biology. The dinosaur, which was alive an estimated 94 to 101 million years ago,