At White Sands National Park, tiny gypsum grains sparkle as they reflect the sun. But under the surface, you’ll find human history etched below.

Mesa Verde National Park in southwestern Colorado protects and preserves the cultural heritage of 26 tribes of Ancestral ...

Based on the new model, the first of these white dwarf explosions isn’t due for at least 10 1100 years. That’s a 1 followed by 1,100 zeros—a number so big that we don’t have a name for it.

Researchers first found a set of human footprints at White Sands National Park in New Mexico. Now, researchers are confident that humans existed as long ago as 23,000 years ago.

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