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

palette

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

More Desktop Wallpapers:

Apr 30, 2024Cheetah in Ngorongoro Conservation Area, Tanzania
Oct 12, 2025Village of Saranac Lake, New York
Oct 14, 2018Gone ‘lightseeing’ in Berlin
Sep 25, 2021Autumn comes to the Porcupines
Nov 15, 2022River otters at Acadia National Park, Maine
Nov 11, 2024Veterans Day
Jun 8, 2021A day for our oceans
Jan 15, 2021It s truffle season here in the Dordogne Valley
Mar 26, 2020Gray days ahead in Monterey
Apr 9, 2021A timeless view of the night sky
Oct 27, 2024Polar Bear Week
Jan 7, 2020Jupiter and the Galilean moons
Aug 31, 2018Let’s have a ball
Jul 11, 2019Evidence of human habitation
Jul 30, 2020International Day of Friendship
Sep 3, 2025Annivesary of the Wilderness Act of 1964
Mar 19, 2021Life carries on, rising from a ship s skeleton
Feb 21, 2020Carnival comes to Olinda
Jun 16, 2020In the footsteps of Leopold Bloom
Mar 2, 2024Modica, Sicily, Italy
Nov 13, 2020Once upon a midafternoon dreary…
Mar 19, 2022Chicagohenge
Oct 25, 2019The lemurs of Madagascar
Oct 21, 2023International Archaeology Day
Jul 15, 2018GOAL!
Oct 29, 2021Ravens
Mar 24, 2024Silvereyes in South Korea
Mar 28, 2022Kawachi Fuji Garden
Dec 30, 2022White Desert National Park, Egypt
May 27, 2022Golden Gate Bridge, San Francisco