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:
-
Protecting wildlife today and tomorrow
-
The glowing waters of the Matsu Islands
-
Just a couple of yellow-billed hornbills
-
Everglades National Park turns 75
-
League of Nations, 100 years later
-
Black grouses lekking
-
Happy Bee Day to you
-
The town of Pienza in Tuscany, Italy
-
Look before you leap
-
Saint Nicholas Day in Verbier, Switzerland
-
Why’s it called a spelling ‘bee,’ anyhow?
-
A holiday beacon of light
-
Superbloom in Carrizo Plain National Monument, California
-
Horsetail Fall, Yosemite National Park, California
-
World Wildlife Conservation Day
-
Stari Most in Mostar, Bosnia and Herzegovina
-
Sandhill cranes, Bosque del Apache National Wildlife Refuge, New Mexico
-
Plitvice Lakes National Park in Croatia
-
Victory Day in Valletta
-
Put your flippers in the air…
-
Przewalskis horses, Hustai National Park, Mongolia
-
Happy Halloween!
-
A silent witness to history
-
Freeze frame
-
Flamenco dancers
-
Shark Fin Cove, California
-
Let the harvest begin
-
Giving Tuesday
-
Bringing the moon to Earth
-
International Sloth Day
Bing Wallpaper Gallery

