Navigating the past with ancient stone compass needles

Magnetic rocks with iron oxide concentrations act as natural chroniclers of Earth's past continental movements. Using small samples of rocks, scientists can isolate magnetic grains that were frozen in orientation as the rock ...

A regulatory loophole could delay ozone recovery by years

Often hailed as the most successful international environmental agreement of all time, the 1987 Montreal Protocol continues to successfully phase out the global production of chemicals that were creating a growing hole in ...

Greece's ancient sites get climate-change checkup

Worsening wildfires, soaring heat waves and rising water levels have prompted Greek officials to take a closer look at protecting priceless archaeological sites that draw hundreds of thousands of visitors each year.

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