A universe underground Jan 2, 2021

A universe underground

When Vietnamese farmer Hồ Khanh stumbled upon this cave in 1991, it was immediately clear the gaping mouth led to a huge, dark, untouched chamber, complete with a free-flowing underground river. What couldn"t have been apparent to him then was that this cave, now known as Sơn Đoòng, is by far the world"s largest by volume.

© David A Knight/Shutterstock

palette

Today in History

Jan 2, 2019Tesla, the visionary
Jan 2, 2020Winter in the Finnish wilds
Jan 2, 2022Prague, Czech Republic
Jan 2, 2023Hohenzollern Castle near Stuttgart, Germany
Jan 2, 2024Prayer flags in Phobjikha Valley, Bhutan
Jan 2, 2025Ardez, Graubunden, Switzerland

More Desktop Wallpapers:

Mar 10, 2021Commemorating the life of a famous railroad conductor
Nov 23, 2022Fibonacci Day
Mar 31, 2021Paradise, found
Oct 9, 2018A history of Vinland
Aug 5, 2023Atlantic puffin, Iceland
Dec 30, 2024Mount Field National Park, Tasmania, Australia
Aug 9, 2021A tribute to the ancestors
Aug 21, 2025A wheatear in Peak District National Park, England
Oct 18, 2018Fall comes to the Last Frontier
Jan 26, 2018Eastern grey kangaroos in Australia’s Kosciuszko National Park
May 27, 2022Golden Gate Bridge, San Francisco
Apr 21, 2019The Easter Bunny’s story
Nov 23, 2020Autumn comes to Old Town
Jun 13, 2023Okefenokee Swamp
Jan 2, 2020Winter in the Finnish wilds
Sep 19, 2019Fall for birding
Aug 2, 2021This reef is nowhere near the sea…
Dec 8, 2021Petrified Forest National Park
Dec 30, 2023Daiichi Tadami River Bridge, Fukushima, Japan
Apr 7, 2022Málaga, Spain
Jan 20, 2021Penguins can t fly!
Nov 1, 2023Native American Heritage Month
Apr 7, 2023International Beaver Day
Aug 28, 2024Paralympic Games begin in Paris
Sep 6, 2018Feeling chic on Fashion Week
Jun 14, 2023Flag Day
Jan 11, 2024Eurasian lynx
May 2, 2021Happy World Laughter Day
May 17, 2024Endangered Species Day
Jan 21, 2022National Hug Day