April 22 is Earth Day, a world holiday celebrating our home planet — and so far, the only one we've got.
Yet we're changing the face of Earth drastically via climate change. At times, it can seem like a massive, invisible process.
But it isn't invisible. In this collection of images (from NASA, unless otherwise noted) you can see the unmistakable mark that human-induced climate change is making on the planet.
Rivers and lakes are shrinking, forests are being cut down, and as the Earth gets warmer snow and ice are melting far sooner than they should be. Take a look:
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Snow melt on Matterhorn Mountain, Switzerland, August 1960 vs. August 2005
Aral Sea shrinkage, Central Asia, 2000 vs. 2014
Melting Muir Glacier, Alaska, 1882 vs. August 2005
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