Starling murmuration over the ruins of Brightons West Pier, England Jan 8, 2026

Today is a day that puts time into perspective. Old Rock Day highlights the vast geological processes that have shaped our world since its earliest eras. In Arches National Park, Utah, United States, Turret Arch—seen through North Window—offers a striking reminder: landscapes can take hundreds of millions of years to assemble. The Entrada Sandstone that forms these arches began as shifting dunes and shallow seas long before erosion carved today"s shapes. Even so, these formations are relatively young. Most rocks on Earth disappear over time because plate tectonics, erosion and volcanism continually recycle the crust. Only the planet"s ancient continental shields preserve truly old material. Canada"s Acasta Gneiss, about 4 billion years old, is the oldest known rock still rooted where it formed.

© Philip Reeve/Photodisc/Getty Images

palette

Today in History

Where we go to play
Jan 8, 2024Bernina Pass, Graubunden, Switzerland
Jan 8, 2025Great Wall of China

More Desktop Wallpapers:

MPs most photographed big cat
Mar 27, 2026World Theatre Day
A flashy, frigid waterfowl
Feb 3, 2026Emerald Bay and Fannette Island, Lake Tahoe, California, United States
Feb 28, 2025Tibetan New Year
We can all just get along
Jul 13, 2024Fairy chimneys and cave dwellings in Cappadocia, Türkiye
Take the trail more travelled by
May 28, 2024The Monastery of Roussanou, Greece
Dec 5, 2024Tufa formation on Mono Lake, California, United States
Jul 31, 2025Kalalau Beach on the Nā Pali Coast, Hawaii, United States
Aug 31, 2023Saguaro cacti, Ironwood Forest National Monument, Arizona
Spring is coming
Nov 28, 2023Varandha Ghat,Bhor,Maharashtra, India
Sep 3, 2023Skyscrapers in Manhattan
Jun 3, 2025World Bicycle Day
Apr 25, 2026World Penguin Day
The Coast of Death
Nov 8, 2025Bandon Beach in Bandon, Oregon, United States
Oct 24, 2025Night view of the RMS Queen Mary, Long Beach, California, United States
Where history comes alive
Feb 11, 2025Yungang Grottoes, Datong, China
The top of Tennessee
What are these beautiful birds?
Jul 25, 2024Great Smoky Mountains National Park, Tennessee, USA
What are they celebrating?
Feb 14, 2026Happy Valentines Day!
Mar 28, 2025Black-naped monarch
Apr 28, 2024Guadalupe Mountains National Park, Texas, USA
May 21, 2025International Tea Day