Fall isn"t just marked by the calendar. Each September, Earth"s subtle tilt brings the autumn equinox—one of two times a year when day and night are nearly equal in length. It marks the beginning of fall in the Northern Hemisphere. From solar alignments to changing leaves, nature offers its own quiet signals that the season has shifted. While for most of us it may seem like just another day, ancient cultures paid close attention to this change. Sites like Chichén Itzá in Mexico and England"s Stonehenge were designed to align with the rising or setting sun during equinox days.
Autumn equinox
Today in History
More Desktop Wallpapers:
-
International Bat Appreciation Day
-
Paradise Cave, Phong Nha-Ke Bang National Park, Vietnam
-
International Day of the Tropics
-
Owl be seeing you ... somewhere!
-
Old barn and canola field, Palouse region, Idaho
-
Willamette National Forest, Oregon
-
International Sloth Day
-
Vancouver Cherry Blossom Festival
-
Carl Sagan Day
-
Carlsbad Caverns National Park, New Mexico, USA
-
World Art Day
-
Racing through the five boroughs
-
Kings Mountain, Chugach Mountains, Alaska, United States
-
When ice imitates art
-
Whooper swans, Kotoku Pond, Japan
-
Happy International Zebra Day!
-
Where buffalo roam
-
Celtic Colours International Festival
-
An experiment in sustainability
-
Third Thai-Lao Friendship Bridge connecting Laos and Thailand
-
International Dark Sky Week
-
Endangered Species Day
-
Ubud, Bali, Indonesia
-
Palazzo Zuccari, Rome
-
World Maritime Day
-
What are they celebrating?
-
World Rhinoceros Day
-
Amphitheatre of El Jem, Tunisia
-
A vibrant, sun-drenched island
-
The Big Apple with a foggy topping
Bing Wallpaper Gallery

