Study: Rotting trees caused mysterious holes in huge dunes

Mysterious holes that forced the closure of a massive dune at an Indiana national park after a 6-year-old boy fell into one and nearly died were caused by sand-covered trees that left cavities behind as they decayed over ...

Untouched cave to provide clues to Black Hills history

The National Park Service is beginning to excavate the mouth of an unexplored cave in the Black Hills of South Dakota, and researchers believe it could help broaden our understanding of how the region's climate has changed ...

New York finally ends record 700 plus days without snow

New York on Tuesday finally ended a record streak of more than 700 days without measurable snowfall, with a thin layer of white powder covering Central Park and other parts of America's most populous city.

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