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Contrasting photos of Heart Spring from 1988 and 2019 Yellowstone

By Yellowstone Volcano Observatory 2019 (approx.)
Contrasting photos of Heart Spring from 1988 and 2019 Yellowstone
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Detailed Description

Contrasting photos of Heart Spring on Geyser Hill in the Upper Geyser Basin from 1998 (left) and 2019 (right). Can you spot differences in the hot spring? Photos courtesy of the National Park Service.

Sources/Usage

Public Domain.