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 ...

Geologists have calculated the age of Earth at 4.6 billion years. But for humans whose life span rarely reaches more than 100 years, how can we be so sure of that ancient date? It turns out the ...

Potassium-argon dating of igneous and metamorphic rocks with applications to the basin ranges of Arizona and Sonora / P.E. Damon -- A comparison of the isotopic mineral age variations and petrologic ...

The IAEA is inviting research institutions to join its new five-year coordinated research project (CRP) on developing radiometric methods for measuring hydrodynamics of constructed wetlands.

Using a method applied directly to ancient hominin teeth, researchers have calculated the age of several important fossils. Measuring the concentration of radioactive elements in a single, sand-size ...