Featured by Kate Morgan
America thrived by choking its rivers with dams. Now it’s time to undo the damage.
The country must decide the fate of more than 90,000 dams, many of which are in disrepair.
Are we killing off all the wild buffalo that still know how to roam?
Most of the bison that wander out of Yellowstone National Park are fair game.
As Rome digs its first new metro route in decades, an archaeologist safeguards the city’s buried treasures
How to build a subway in the Eternal City.