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 2,000 square kilometres of Siberian forest near the Tunguska River. The blast released energy equal to 10–15 megatons of trinitrotoluene (TNT), a standard measure of explosive force. Since then, craters like United States" Barringer, Canada"s Manicouagan and others have helped scientists study what happens when space rocks hit Earth.

© Abstract Aerial Art/Getty Images

palette

Today in History

Where did you drop the fish, son?
Will we be ready for the ‘big one?’
Jun 30, 2024Ubud, Bali, Indonesia

More Desktop Wallpapers:

Jan 24, 2026Andermatt village in the Alps, Switzerland
Nov 13, 2025Quiver trees, Keetmanshoop, Namibia
Jul 17, 2024Rothenburg ob der Tauber, Bavaria, Germany
Let the Great Backyard Bird Count begin!
Feb 5, 2024Monarch butterflies
A true symbol of heritage and royalty
Sep 3, 2023Skyscrapers in Manhattan
May 6, 2025An ultralight aircraft flying over the sands of Namibia
Nov 19, 2023Alam-Pedja Nature Reserve, Estonia
This blue succulent is as good as gold here
Oct 19, 2024Temple of Hathor, Dendera Temple Complex, Qena, Egypt
Oct 27, 2023Sligachan Old Bridge, Isle of Skye, Scotland
Apr 15, 2024Centraal Station, Antwerp, Belgium
Apr 29, 2024Fujian Tulou, China
Sep 28, 2025Town of Pienza in Tuscany, Italy
Bridging the gap two ways
Oct 30, 2024Edinburgh Castle, Scotland, United Kingdom
Revealing natures turquoise gem
Nov 18, 2025Male hooded merganser, Oregon, United States
Sep 19, 2025Thousand Islands region, St. Lawrence River, USA-Canada border
Lighting the world
Mar 2, 2025Megalong Valley, Blue Mountains National Park, NSW, Australia
A shiver of sharks on the hunt
Dec 12, 2025Poinsettia: A winter classic
Bryce Canyon hoodoos in winter
Revered ruins
Oct 4, 2023World Space Week
In the tropics, land greets sea warmly
Feb 8, 2024Mount Hood, Oregon
Sep 9, 2025A female Eurasian red squirrel, Switzerland