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Is your colleague's perfume too strong? Did the cleaning crew just come by? Some say fragrances are chemical irritants that should be banned from the office. But doing so isn't so easy.

The museum presented on Monday a new sculpture by artist Chris Burden, who died May 10. "Ode to Santos Dumont," is a kinetic airship inspired by the Brazilian aviation pioneer, Alberto Santos-Dumont.

NPR's Robert Siegel interviews physicist Alan Nathan, a professor at the University of Illinois, about how homeruns are up by 40 percent after using flat-seamed balls this season.

In a new book, David Axelrod, a political strategist who helped Obama triumph in two presidential campaigns, said Obama opposed gay marriage for political expediency.

The U.S. military is closing a facility scientists have used to study the edge of Earth's atmosphere. Conspiracy theorists suspect it's also been used for nefarious activity — like mind control.

Iraq's government is using limited air attacks to strike back at the Sunni group known as ISIS, which now controls large areas of northern Iraq.

A video from NASA shows how air pollution moves around the world. So what happens when emissions from Asia blow across the Pacific Ocean to North America?

A new study published in Science looked at thousands of marine animals over a 540-million-year evolutionary span. Their conclusion: Most of them got larger.

It's been 25 years since people could light up with impunity on domestic airline flights. But that doesn't mean they're not still trying. And e-cigarettes are reviving conflict over clean air aloft.

Calling it the "most promising lead" so far, the leader of the search for a missing Malaysia Airlines jetliner says ships have again detected a signal used by "black box" beacons.