In 1987, an enormous blue arc, thought to be hundreds of trillions of miles long, was first considered one of the largest ...

Animal life, emerging nearly 600 million years ago, showcases incredible diversity and unique traits. Unlike plants, animals ...

Earth’s violent collision with a protoplanet may have given birth to the Moon. Discover the giant-impact theory and the ...

Several key moments in Earth's history help us humans answer the question "How did we get here?" These moments also shed ...

It isn’t easy to figure out how the Earth was built, because it happened 4½ billion years ago, and no one was there to watch. So scientists have had to look at what the Earth looks like now and ...

Earth's magnetic field was so weak it almost disappeared. Then, seemingly out of nowhere, complex life emerged.

Ancient oxygen-making microbes may have oxygenated large swaths of Earth ... years before the element filled the atmosphere. Geochemical analysis of sediments deposited roughly 2.6 billion years ...

The horseshoe-shaped Midcontinent Rift is a 2,000-kilometer scar that is also called North America's 'broken heart' by ...

Chemists at UCL and the MRC Laboratory of Molecular Biology have demonstrated how RNA (ribonucleic acid) might have ...

CAPE CANAVERAL, Fla. — Strauss’ “Blue Danube” is heading into space this month to mark the 200th anniversary of the waltz ...

One of the warmest periods on Earth The Early Cretaceous epoch – between roughly 140 million and 100 million years ago – represents one of the warmest periods in the last half a billion years ...