The European Space Agency’s ACES mission could ultimately pave the way for a global network of atomic clocks that make these measurements far more accurate. In 2003, engineers from Germany and ...

Measuring altitude using your phone has become increasingly accurate and convenient, thanks to advancements in smartphone technology and the integration of various sensors. Here’s a comprehensive ...

A portable optical lattice clock on a trailer has been used to measure elevation deep inside a mountain near the France-Italy border. Although this elevation measurement is not as precise as ...

A Field Museum scientist has developed a novel way to determine land elevation as continents moved around the Earth through geological ages. Knowing how high mountains and plateaus were in the past ...

Eight hours after we stood on the roof of Washington last summer, our guides rewarded us with certificates that read “Mount Rainier, 14,410 feet.” Aware many others believe the mountain is actually a ...