Will El Niño become supersized? What experts are saying

El Niño is here. But will it become supersized? NOAA says there's a 90% or greater chance for El Niño to become "very strong" between September and January.

Giant trees break a decades-old science theory

Giant trees have evolved remarkable adaptations that allow them to reach extreme heights while maintaining efficient water transport.

Do you love twilight? The 3 stages explained

Twilight is that magical time between sunlight and darkness. Astronomers, experts on nighttime, recognize 3 stages of twilight.

Nepal flash flood nightmare: What caused it?

On August 26, 2026, a glacier collapse and landslide triggered a huge release of water. The Nepal flash flood wiped out villages and took untold lives.

National parks from space: How many can you name?

Take the quiz to see how many national parks from space you can name. And don't forget to celebrate National Park Week, from August 22 to 30!

Will you see colors in aurora? Or do you need a camera?

If you live below 50 degrees N. latitude, any aurora visible is likely to be low on your horizon, and you're less likely to see vivid colors.

1st photo of Earth from the moon 60 years ago

As NASA plans to land astronauts on the moon with the Artemis IV mission in 2028, it's fun to see this 1st photo of Earth taken from the moon.

Pyrocumulonimbus clouds are fire-generated thunderstorms

This summer, NASA has been studying pyrocumulonimbus clouds, or fire-driven thunderstorms. Researchers are flying planes right into the plumes for samples.

Ancient Amazon civilization might have been home to millions

Laser surveys have revealed hundreds of earthworks in the Amazon. Researchers estimate the ancient Amazon civilization could have supported 3 million people.

Why the Spokane wildfires became so catastrophic

Spokane wildfires show wildfire risk is growing, but preparedness, resilient communities and smarter land management can reduce future losses.