Alamosaurus was one of the last dinosaurs from southern North American. Paleontologists have recently dated the rock formation from where it was found in New Mexico to around 340,000 years before the ...

New analysis shows several families of dinosaurs were likely thriving in North America in the latter days of the dinosaur era. Reading time 3 minutes Diversity is central to one of the biggest ...

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction. New research suggests dinosaur populations were still ...

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed flourishing communities. Alamosaurus was one of the last dinosaurs from ...