An international team of American and Chinese paleontologists has discovered a new species of mammal that lived 125 million years ago during the Mesozoic Era, in what is now the Hebei Province in ...

When searching for exoplanets with potentially habitable atmospheres, astronomers really only have Earth as an example of what to look for. But a new study says that a past era of Earth may be a ...

The Mesozoic Era, the Age of Dinosaurs, is sometimes also referred to as the Age of Reptiles. Not only were dinosaurs, which were reptiles, all over the continents, but reptiles also ruled the seas.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. When dinosaurs ...

Picture a baby Brachiosaurus the size of a golden retriever, hunting for food with its siblings while dodging predators that would happily eat it. Meanwhile, its parents—towering over 40 feet tall—are ...

Scientists recently discovered the skull of an extremely tiny, bird-like dinosaur that could be the smallest known species of the Mesozoic era—the period in which giant dinos like brachiosaurus, ...

Step back in time to the Mesozoic Era, where dinosaurs ruled the Earth. With this quiz, you’ll encounter iconic giants like the T. Rex and the Stegosaurus, clever predators like the Velociraptor and ...

When astronomers search for worlds that could possibly host life, they’re operating off of just one example: Earth. So far as we can tell, our specific cocktail of nitrogen, oxygen, and other trace ...