The Geografile

By Bryan Henry
This item appears on page 44 of the July 2019 issue.
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Lake Nicaragua contains about 400 islands, some of which are active volcanoes. Since the lake was severed from the Pacific Ocean by a belt of volcanic cones, unique freshwater species of swordfish have evolved.

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Lake Nicaragua contains about 400 islands, some of which are active volcanoes. Since the lake was severed from the Pacific Ocean by a belt of volcanic cones, unique freshwater species of swordfish have evolved.