Earth’s greatest extinction event happened in a one-two punch 252 million years ago. Research now suggests that the second pulse of extinction, during which nearly all marine species vanished from the planet, happened in the wake of huge volcanic eruptions that spewed out carbon dioxide and made the oceans more acidic.
Read more : http://www.geologypage.com/2015/04/acidic-oceans-linked-to-greatest.html
"After a day of thunder and rain the sky suddenly cleared and gave way to a truly cosmic display behind the famous buttes of Monument Valley. The foreground and the buttes were lit by some passing cars, while the orange glow on the horizon is caused by light pollution from some nearby small towns."
Monument Valley is a region of the Colorado Plateau characterized by a cluster of vast sandstone buttes, the largest reaching 1,000 ft (300 m) above the valley floor. It is located on the Arizona-Utah state line, near the Four Corners area. Monument Valley has been featured in many forms of media since the 1930s. Director John Ford used the location for a number of his best-known films, and thus, in the words of critic Keith Phipps, "its five square miles have defined what decades of moviegoers think of when they imagine the American West." (Source: Wikipedia)
Camera: Canon EOS 7D Mark ll
Lens: Samyang 10mm at f/2.8
Mount: iOptron SkyTracker
Composite of two 180s photographs at ISO 1600. One untracked for the foreground and one tracked for the sky.
Credit: Flickr user Skypointer
Date: June 11, 2015
#Space #Astronomy #Stars #MilkyWay #Galaxy #Astrophotography #Art #Science #SolarSystem #Cosmos #Universe #Earth #MonumentValley #Buttes #Arizona #Utah #USA #UnitedStates #TheWest #Westerns #Film #History #America
- University of Bonn
"To laugh often and much;
to win the respect of intelligent people and the affection of children;
to earn the appreciation of honest critics and
to endure the betrayal of false friends.
To appreciate beauty;
to find the best in others;
to leave the world a bit better whether by a healthy child, a garden patch, or a redeemed social condition;
to know that even one life has breathed easier because you have lived.
This is to have succeeded."
R. W. Emerson
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