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 ...

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 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 ...