|by Sean O'Neill||National Parks, State Parks, Utah||1|
It fell down a week ago due to gravity and erosion, says the AP. The arch had measured about 33 feet tall and 71 feet across and had been made of thin, vertical sandstone fins.
Here are the before-and-after views, courtesy of a half-minute video on YouTube:
Luckily, there are still about 2,000 other arches intact, including Delicate Arch