A tree-climbing scientist takes the measure of a 3,200-year-old, 247-foot-tall sequoia.
National Geographic on TV: Big Cat Week
Find out why you shouldn’t panic—at least, not yet.
Once heavily hunted for its valuable skin but now protected, Brazil's yacare caiman is striding back in gratifying numbers.
Visions: Your Shot
Nuclear Power, Risking a Comeback - It's controversial. It's expensive. And it might just save the Earth.
Can a marine reserve network save some of the richest waters in the world?
×DefaultCinematic×DefaultCinematicOrder prints of select National Geographic photos at NationalGeographicArt.com.
In 1418 the town fathers of Florence finally addressed a monumental problem they’d been ignoring for decades: the enormous hole in the roof of their cathedral. Season after season, the winter rains and summer sun had streamed in over Santa Maria del Fiore’s high altar—o