New research shows that fossilized dinosaur eggshells can be used to help scientists more precisely date prehistoric nesting ...

Image: A secondary electron microscopy image of a zircon from volcanic ash, about four thousandths of an inch (100 microns) across. The zircon has been cut and polished, then treated with ...

Dating of rocks that once formed some of the world’s first beaches suggests the first large continents grew large enough to rise above sea level roughly 3 billion or so years ago. What caused the rise ...