For decades, scientists have relied on tree rings to estimate how long trees can live. But new research suggests that this widely used method may have been underestimating the lifespan of many ...

Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years. Mountains have been built and eroded, continents and oceans have moved ...

Image: Tiny crystals called zircons are used to date oceanic crust. A newly developed method that detects tiny bits of zircon in rock reliably predicts the age of ocean crust more than 99 percent of ...

“This study demonstrates that eggshell biocalcite from non-avian dinosaurs, birds, and other egg-laying vertebrates has the ...

Dedicated at the University of Chicago on October 10, 2016. In 1946, Willard Libby proposed an innovative method for dating organic materials by measuring their content of carbon-14, a newly ...