Add Yahoo as a preferred source to see more of our stories on Google. Illustration of the last dinosaurs from southern North America, featuring the giant plant-eater Alamosaurus sanjuanensis, from the ...

About 150 million years ago, the land that is now the western United States was alive with dinosaurs. New research shows that the smallest members of the biggest dinosaurs played a huge role in ...

WASHINGTON (Reuters) - A fossil site in New Mexico with numerous dinosaurs, including the gargantuan Alamosaurus, dates to shortly before the asteroid strike that abruptly ended the age of dinosaurs, ...