A river

The Controversial Core of the Clean Water Act

Proposed changes to the Clean Water Act would make it more difficult to define what bodies of waters are deemed worthy of protection.
Buzz Aldrin and the U.S. Flag on the Moon

Should the Moon Landing Site Be a National Historic Landmark?

Some archaeologists argue it’s essential to preserve the history of lunar exploration. But would it represent a claim of U.S. sovereignty over the moon?

Can Re-Clamming Our Harbors Keep Superstorms at Bay?

Hurricanes like Sandy destroy coastlines. Clams and oysters help keep them together.