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
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Today, a nation was born
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International Day of Forests
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Step back in time...
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Saint Andrews Day
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Sligachan Old Bridge, Isle of Skye, Scotland
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Shenandoah National Park, Virginia
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Star Wars Day
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Reflecting on Christmas
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Northern Lights
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A group of Southern gemsbok in the savannah, Botswana
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Go hug a mountain, if you can
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The Coast of Death
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What returned to this city 500 years ago?
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International Beaver Day
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Happy Pi Day!
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Walton Lighthouse, Santa Cruz, California, USA
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Bodie State Historic Park, California, United States
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A time-worn medieval marvel
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Stealthy pollinators
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Northern gannets, Shetland Islands, Scotland
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Happy International Day of Forests!
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The ‘Old Bridge,’ reborn
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When just a pinch of salt won’t do
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Vancouver Coastal Sea wolves in the Great Bear Rainforest
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Golden Gate Bridge, San Francisco, California
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Sequoias of the sea
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Keep practicing, little guy
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Sea Otter Awareness Week
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Dinosaur Provincial Park
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King of the jungle? Nope