With giant Saturn hanging in the blackness and sheltering Cassini from the Sun’s blinding glare, the spacecraft viewed the rings as never before. NASA/JPL/Space Science Institute

A brief astronomical history of Saturn’s amazing rings

Although the rings of Saturn may look like a permanent fixture of the planet, they are ever-changing. New analyses of the rings reveal how and when they were made, from what and whether they'll last.
A proposed new train in Mexico would connect the archaeological site of Chichen Itza, on the Yucatan Peninsula, easier to reach from Cancun. REUTERS/Mauricio Marat/National Institute of Anthropology and History

Mexico wants to run a tourist train through its Mayan heartland — should it?

An ambitious new train would link resorts like Cancun to inland ancient ruins and colonial towns. That means laying rail across 932 miles of dense jungle, pristine beach and indigenous villages.
Steller sea lions in the eastern Pacific are an Endangered Species Act success story. David B. Ledig/USFWS

Saving endangered species: 5 essential reads

The Trump administration is changing implementation of the Endangered Species Act in ways that conservationists say would reduce protection for some of America's most threatened wildlife.
Alejandro Giammattei is a former prison official whose tenure was tainted by the 2006 mass killing of seven prisoners. He was accused but never indicted on conspiracy charges in those deaths. AP Photo/ Santiago Billy

Guatemala’s next president has few plans for fixing rampant corruption, crime and injustice

Conservative Alejandro Giammattei beat former first lady Sandra Torres with 60% of the vote. But turnout was the lowest in Guatemala's modern history, in apparent protest of both candidates.
Visualization of the Tropical Rainfall Measuring Mission satellite in space over a tropical cyclone. NASA

We use satellites to measure water scarcity

Climate change threatens the water supply of nations around the world. But it's difficult to measure whether a region has sufficient water to satisfy the people who live there. Could satellites help?
White nationalists participate in a torch-lit march on the grounds of the University of Virginia ahead of the Unite the Right Rally in Charlottesville, Va., on Aug. 11, 2017. Stephanie Keith/Reuters

Talking about Charlottesville with alt-right students

A Holocaust scholar discusses what she learned from reaching out to alt-right students and capturing their reflections on the white nationalist Charlottesville rally of 2017.

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