Are you older than this lake?

If you were born before summer 1991, the answer is yes. Sorry if you already felt a bit long in the tooth, but it's true: Until 30 years ago, Lake Pinatubo was just a rumble in Mount Pinatubo's magma-filled belly. It was a calamitous eruption on June 15, 1991—one of the 20th century's most powerful—that blew off Pinatubo's original summit and formed a vast crater, which gradually filled with water as greenery reclaimed the summit.
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