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A big difference between humans and other apes is the ability to stride easily on two feet. A new analysis of fossil bones shows that adaptations for bipedal walking go back 7 million years.

Officials at Grand Canyon National Park are still assessing damage and engaged in recovery efforts from weekend flash flooding.

The FDA has approved a new drug to treat pancreatic cancer. NPR's A Martinez speaks with Adam Feuerstein, who writes for the science and health website STAT.

This year's glacial outburst flood event in Juneau was minimally damaging, but residents worry about the future. A permanent solution to drain the glacial lake will be chosen by the end of 2026.

For centuries, Navajo shepherds have herded sheep in Arizona's mountains. Now, springs they rely on are drying up, putting a mainstay of the tribe's culture at risk.

The director of American Doctor and two physicians in the film discuss the challenges of treating Gaza's wounded civilians and why they believe the world must see what is happening there.

In the Big Bend area of West Texas, contractors are beginning to set the stage to build the Trump administration's planned border wall and barriers, despite bipartisan opposition.

The Food and Drug Administration is expected to decide whether to approve the first mRNA flu vaccine.

Five states hold primary elections Tuesday in races that could signal the future for the Democratic and Republican parties.

The Supreme Court is allowing construction to continue on the White House ballroom over dissents from the chief justice and the court's three liberals.