Study suggests dinosaurs originated in the Amazon, but their fossils are missing. They started as small, bipedal creatures in a hot climate.

Dinosaurs long dominated Earth's land ecosystems with a multitude of forms including plant-eating giants like Argentinosaurus, meat-eating brutes like Tyrannosaurus and weirdos like Therizinosaurus, with its Freddy Krueger-like claws.

The story of how dinosaurs came to dominate Earth has fascinated scientists and the public for generations. But what if we’ve been looking in the wrong places for their earliest ancestors? A groundbreaking new study suggests that the first dinosaurs may have emerged not in the temperate regions of ancient Earth,

The world's earliest dinosaurs may be located in some of the hardest places on Earth to investigate, according to new research from the University College London and the UK's Natural History Museum