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Sunday, March 21, 2021

Fun Facts of the day


Mysterious sand dune holes baffled Indiana for years.

For years, mysterious 10-feet deep sand holes kept appearing, then disappearing in dunes at a national park in Indiana. After multiple people—including a six-year-old boy—fell in, scientists discovered that the holes were formed when sand-covered trees decayed over time.

A 2016 study by Indiana University Northwest's department of geosciences found that the trees were once covered in fungi that formed a cement-like substance that held its shape even when the tree rotted away. When the cement-like covering and the sand around it eventually gave way, it formed the holes.


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