Earth Day Apr 22, 2025

Earth Day

On Earth Day, let"s journey to one of nature"s most stunning displays of geothermal power—Grand Prismatic Spring in Yellowstone National Park, Wyoming. The largest hot spring in the US, it spans 370 feet across and reaches temperatures of 160°F. This geothermal marvel is fueled by the immense heat of the massive Yellowstone volcano beneath the surface. Its vivid rings of blue, green, yellow, and orange are created by heat-loving microorganisms—called thermophiles—that thrive in the mineral-rich waters.

© Ajith Kumar/Getty Images

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Today in History

Apr 22, 2018Have a ‘beary’ good Earth Day
Apr 22, 2019Meet our fuzzy Earth Day mascot
Apr 22, 202050 years of Earth Day
Apr 22, 2021Gazing down on planet Earth
Apr 22, 2023Earth Day and National Park Week
Apr 22, 2024Earth Day
Apr 22, 2026Earth Day

More Desktop Wallpapers:

Oct 23, 2025International Day of the Snow Leopard
Feb 4, 2019Sitting down and taking a stand
Mar 13, 2024Lake Magadi, Kenya
Jul 30, 2022Milford Sound/Piopiotahi rainforest in New Zealand
Mar 14, 2022Pi Day
Aug 10, 2020Kings of the Kalahari
Mar 29, 2021Rising up from the black sand like rock gods
Dec 11, 2019In the Himalayas for International Mountain Day
Dec 27, 2018A wonderland in winter
Aug 14, 2021When Death Valley blew its top
Jan 4, 2025Bản Giốc–Detian Falls, Vietnam
Sep 20, 2020Celebrating sea otters
Mar 28, 2019Let us introduce you…
Jan 11, 2019Life in a North African town
Jun 2, 2024National Gardening Week
Mar 16, 2021Why does this panda cub look so happy?
May 17, 2024Endangered Species Day
Feb 24, 2023Mandarin duck, Richmond Park, London, England
Feb 24, 2022Glacier cave in Iceland
Jan 19, 2018Old Town in Prague, Czech Republic
Oct 11, 2023National Fossil Day
May 11, 2019Bringing together history and technology
Jan 27, 2025Zoroaster Temple, Grand Canyon National Park, Arizona
Nov 18, 2020An aviation celebration
Nov 14, 2018Monet still makes an impression
Apr 12, 2022International Day of Human Space Flight
Jul 4, 2025Happy Fourth of July!
Apr 13, 2025Songkran—Thai New Year
Aug 28, 2018Class, please take out a No. 2 pencil…
Apr 9, 2020Hooray, hooray, it s Unicorn Day!