Paleoartist Roman Uchytel has created a gallery of size-comparison images that highlight the radical evolutionary journey that modern day animals have undergone when compared to their long-extinct ...

Sauropods – including iconic long-necked dinosaurs like Brachiosaurus and Apatosaurus – were the largest animals ever to walk the earth. No other dinosaur or land mammal even comes close. Now, a new ...

They had teeth the size of bananas, were as long as buses and limos, and preyed on dinosaurs that fed near their waterways. Those are among some of the findings presented in a new study announced this ...

Sometime during the Cretaceous Period, 125 million years ago, a feisty mammal the size of a domestic cat encountered a dinosaur three times its size and thought it looked like a tasty meal. A fossil ...

A survey of prehistoric bones reveals that T. rex and some of its cousins had more than one way to reach enormous sizes. Evolution may have preserved that variation in modern animals too.

"Our model predicted these animals would open the forest enough that sufficient light began to enter the understory, and larger seeds were no longer successful over smaller seeds," Doughty said. "The ...