About 66 million years ago, a city-size asteroid slammed into what is now the Yucatán Peninsula, ushering in a long period of darkness that snuffed out the nonavian dinosaurs. Researchers have long ...

A great Tyrannosaurus rex strides through the conifer trees of her territory, sniffing the air. She picks up the scent from ...

Experts on meteoritics and palaeontology have created a detailed timeline to take you back to the very last day of the ...

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 -- ...

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 ...

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 ...

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 ...

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 ...