5 of the world’s oldest lakes have survived for millions of years, and some are older than the Himalayas

Most lakes seen today are geologically young, carved out by moving ice during the last Ice Age and destined to fill with sediment or dry up within a few thousand years. Scientists generally only call a lake ancient if it has held water continuously for more than one million years without drying out or silting up completely, and by that standard, only around twenty lakes on the entire planet qualify.

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