Roll back the tape of Earth's history, and geologists and astrobiologists remain perplexed about the environmental conditions ...

"The Moon is like a time capsule—it has preserved a record of events that have been erased from Earth by erosion, plate ...

Earth is the only life-supporting planet we know of, so it's tempting to use it as a standard in the search for life elsewhere. But the modern Earth can't serve as a basis for evaluating exoplanets ...

IMAGE: A new study by CU-Boulder researchers indicates a thick organic haze shrouding Earth several billion years ago was similar to the one now hovering over Saturn’s largest moon, Titan. University ...

Water has made the Earth the planet that it is—a planet known for its blue oceans. Water shapes the land through erosion and is fundamental to Earth’s ability to support life. But we have a hard time ...

Methane could form much more easily, and much more widely, on early Earth than scientists previously realized, according to a recent study in the journal Nature. The chemical compound, made of carbon ...

Chemists at Scripps Research have shown for the first time how cyanide could have enabled some of the earliest metabolic reactions to create carbon-based compounds from carbon dioxide. In addition to ...

A new study by CU-Boulder researchers indicates a thick organic haze shrouding Earth several billion years ago was similar to the one now hovering over Saturn’s largest moon, Titan (above) and may ...

One broken piece of quartz in a physics lab could shed light on the history of life on Earth and the search for other habitable worlds. Today, most life as we know it depends on oxygen. Specifically, ...