Astronomers have been on a quest to find another planet that can support life ever since space travel became possible, and even before. Last week, astronomers announced that they had found three “super Earths.”

Mars gets as far as 250 million miles away, but many parts of it closely resemble places on Earth, including its landscape, history of water, soil and even its weather, says a Texas A&M University researcher in the current issue of "Science" magazine.

You may want to thank David French in advance. Because, in the event that a comet or asteroid comes hurtling toward Earth, he may be the guy responsible for saving the entire planet.

It wasn't a "Deep Impact," or "Armageddon," but asteroid 2009 DD45 came pretty darn close to hitting Earth on Monday.

The Hadley cells form the planetary overturning circulation in the tropical atmosphere.

Extremes are exciting. Does anyone really think dinosaurs would capture our imagination the way they do if they hadn't been so huge? You don't see natural history museums vying for fossil skeletons of prehistoric rodents.

In 3.5 billion years, life on earth went from single microscopic cells to giant sequoias and blue whales. Scientists have now documented quantitatively that the increase in maximum size of organisms was not gradual, but happened in two distinct bursts "tied to the geological evolution of the planet," said Michal Kowalewski, professor of geosciences at Virginia Tech.

Researchers have captured for the first time a geological event considered key in shaping the Earth's landscape.

The planet's present day greenhouse scourge, carbon dioxide, may have played a vital role in helping ancient Earth to escape from complete glaciation, say scientists in a paper published online today.

A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago — much earlier than scientists had believed, according to new research by UCLA geochemists reported Nov. 27 in the journal Nature.

McGill University researchers have discovered the oldest rocks on Earth – a discovery which sheds more light on our planet's mysterious beginnings. These rocks, known as "faux-amphibolites", may be remnants of a portion of Earth's primordial crust – the first crust that formed at the surface of our planet.

Have you ever wondered what our world would look like stripped bare of all plants, soils, water and man-made structures? Well wonder no longer; images of the Earth as never seen before have been unveiled in what is the world's biggest geological mapping project ever.