United States

Northern Mariana Islands

Puerto Rico

American Samoa

Guam

U.S. Virgin Islands

U.S. Minor Outlying Islands

US & Territories

Polar Extremes

Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.

Canada

US, US Territories, Canada

Hunt for the Oldest DNA

Follow the quest to recover DNA millions of years old for the very first time.

General - US & Territories

6 footprints embedded in beige, crusty desert surface

Ice Age Footprints

Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.

Revolutionary War Weapons

Explore key military technologies in the American colonies’ fight for freedom.

International Space Station floating above the Earth

Operation Space Station: Science and Survival

See how ingenuity and teamwork keep the crew alive and doing science 250 miles above Earth.

Operation Space Station: High-Risk Build

Astronauts and Mission Control relive terrifying moments during construction of the ISS.

Massive flood going through road and cars

Superfloods

Find out why deadly flash floods are on the rise and how we can protect ourselves from them.
The deadly flash floods in Texas over the 2025 Fourth of July weekend were just the latest reminder of an alarming new reality: Once-rare &quot;superfloods&quot; are striking with unprecedented ferocity, devastating communities around the globe. Join investigators as they piece together a moment-by-moment account of the Asheville, North Carolina disaster in 2024, when Hurricane Helene triggered flash floods and mudslides in a city 2,000 feet above sea level and more than 250 miles inland. Discover how hidden atmospheric phenomena, combined with a warming planet, are creating a new era of risk. Can science offer a lifeline to communities facing an increasingly dangerous future? (Premiering October 29, 2025)

Find out why deadly flash floods are on the rise and how we can protect ourselves from them.