Asteroid Day Jun 30, 2025

Asteroid Day

Each scar on Earth from a meteorite impact tells a story—from the asteroid that wiped out the dinosaurs to the lesser-known craters that dot the planet. Asteroid Day highlights ongoing research into asteroids and the potential threats they pose. Started in 2015 and backed by the United Nations, this day marks the anniversary of the Tunguska event—a massive explosion that occurred in Siberia on June 30, 1908. This explosion flattened over 800 square miles of Siberian forest near the Tunguska River. The blast released energy equal to 10–15 megatons of TNT, a standard measure of explosive force. Since then, craters like Arizona"s Barringer, Quebec"s Manicouagan, and others have helped scientists study what happens when space rocks hit Earth.

© Abstract Aerial Art/Getty Images

palette

Today in History

Jun 30, 2018The aftermath of a meteorite
Jun 30, 2019San Francisco’s City Hall illuminated by the iconic colors of Pride
Jun 30, 2020We re gonna need a bigger birdhouse
Jun 30, 2021An impactful day
Jun 30, 2022Asteroid Day
Jun 30, 2023Brown bears in Lake Clark National Park and Preserve, Alaska
Jun 30, 2024Ubud, Bali, Indonesia
Jun 30, 2026Giraffes at sunset in the Masai Mara National Reserve, Kenya

More Desktop Wallpapers:

Aug 15, 2025Spotted eagle rays in the Galápagos Islands
Dec 20, 2019Tree of many colors
Apr 4, 2023Roman bridge of Córdoba, Spain
Feb 13, 2020Midwinter freeze
Mar 22, 2019Fresh water on the Silk Road
Feb 10, 2026Es Vedrà and Es Vedranell, Ibiza, Spain
Feb 28, 2018Isla del Pescado on the Salar de Uyuni in Bolivia
Aug 31, 2022Blue linckia sea stars in Papua New Guinea
Jun 18, 2019From garden to table?
Feb 3, 2026Emerald Bay and Fannette Island, Lake Tahoe, California
Jun 13, 2026Sunset in Badlands National Park, South Dakota
Aug 9, 2023International Day of the Worlds Indigenous Peoples
Jun 28, 2021A medieval celebration in the Mediterranean
Dec 19, 2018Hezké svátky
Feb 2, 2025Groundhog Day
Jan 18, 2025Dunes at White Sands National Park, New Mexico
May 14, 2018Celebrating Bike to Work Week, May 14-18
Dec 13, 2018Iceland awaits the Yule Lads
Mar 13, 2023National Napping Day
Oct 23, 2020Saskatchewan s spookier side
Feb 10, 2022The Old City of Bern
Jun 26, 2020Beautiful baobabs
Dec 1, 2024Antarctica Day
Sep 17, 2019Constitution Day and Citizenship Day
Dec 31, 2020Goodbye, 2020!
Jan 12, 2025Crescent-tail bigeye fish, Great Barrier Reef, Australia
Jul 1, 2018Let the games begin
Dec 21, 2022Winter solstice
Jul 6, 2022Kissing Day
May 1, 2024Lei Day