Fall is in the air—officially. The September equinox marks the transition from summer to autumn in the Northern Hemisphere, while in the Southern Hemisphere, spring is just beginning. The term "equinox," derived from Latin, means "equal night." It marks one of two points during the year when the sun sits directly over the equator, and the Earth receives roughly equal amounts of daylight and darkness.
Autumnal equinox
Today in History
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Alpine marmots at Hohe Tauern National Park, Austria
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Happy Father s Day
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Blue-footed booby, Galápagos Islands
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Did they forget to fly south?
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Cecropia leaf and lobster claw petals in Mexico
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Anshun Bridge, Chengdu, China
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International Chameleon Day
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Arenal Volcano, Costa Rica
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Tigh Mor Trossachs on Loch Achray, Scotland
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Eurasian red squirrel in Northumberland, England
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Guiding ships to safety
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It s only Wednesday
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A star blows a bubble
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Rising up from the black sand like rock gods
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Glendurgan Garden hedge maze is 186 years old
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Kalalau Beach on the Nā Pali Coast, Kauai, Hawaii
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Presidents Day
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National Love a Tree Day
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Halloween
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The old guard at Old San Juan
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Bridge to infinity
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Elephant Rock, Al-Ula, Saudi Arabia
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The beach at Cala Luna, Sardinia, Italy
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Gateway Arch in St. Louis, Missouri
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The Wall for Peace
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Where do those colors come from?
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Galeries Lafayette, Paris
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Haghartsin Monastery, Armenia
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‘The mountains are calling’
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Beaver achievers
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