Mark Ralston/AFP/Getty Images, Tiny Fox Lab
“Old Faithful” first earned its name in 1870, when a group of explorers noted that it erupted roughly once every 60 minutes. After decades of earthquakes, it now erupts about every 90 minutes. – Tiny Fox Lab Facts
Preview photo credit: Mark Ralston/AFP/Getty Images
Source: history.com/news/10-things…
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