Add Yahoo as a preferred source to see more of our stories on Google. Instead of relying only on marine sediments or ancient soils to piece together past climates, researchers are now using oxygen ...

Geologists doing fieldwork in southeastern Utah's Cedar Mountain Formation found carbon isotope evidence that the site, though on land, experienced the same early Cretaceous carbon-cycle change ...

Global warming. Rising sea levels. Massive volcanic activity around the world. Widespread erosion. It's not a scene from the latest Hollywood disaster film, "The Day After Tomorrow," but Earth as it ...

During the Cretaceous period, a balmy forest grew less than 600 miles from the South Pole, according to new research that uncovered ancient spores and roots. Millions of years ago, Earth’s atmosphere ...

A team of American and European researchers have confirmed that the Cretaceous-Paleogene extinction -- the event that wiped out roughly 75% of the planet's species, including almost every dinosaur -- ...

So much has been written about the extinction of the dinosaurs that finding anything new to say is a tall task. By mid-2006, the understanding has remained virtually unchanged for a decade or more: a ...

Roughly 66 million years ago, an asteroid some 6-9 miles in diameter slammed into the Yucatan peninsula. Researchers have a fairly good idea what happened next. The impact delivered roughly the same ...

Scientists continue to refine techniques for understanding present-day changes in Earth's environmental systems, but the planet's distant past also offers crucial information to deepen that ...

Scientists continue to refine techniques for understanding present-day changes in Earth’s environmental systems, but the planet’s distant past also offers crucial information to deepen that ...