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Recent Contributions
- A surprise find in Michigan shows the extent of ancient Native American agriculture
- Hells Canyon, the deepest gorge in the U.S., is surprisingly young
- Does the narwhal’s famous tusk help it catch fish?
- The moon’s grand canyons were carved in the blink of an eye
- You might beat back phragmites, the scourge of wetlands, but then what?
- Birders argue over plan to change dozens of bird names
- NASA will bring stranded astronauts back on SpaceX — not Boeing's Starliner
- The highly anticipated Perseid meteor shower is about to peak. Here's how to watch
- Astronomers are scrambling to save the world's most powerful X-ray space telescope
- Asteroid headed toward Earth? NASA simulation explores how the nation might respond