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Oct 13, 2018‘Hello’ from zero degrees longitude

This laser projected from the Royal Observatory at Greenwich, in London, England, marks the prime meridian, dividing Earth’s Eastern and Western Hemispheres and helping travelers to chart their courses by establishing a universally adopted 0 degrees longitude. The meridian itself is essentially an imaginary line, arbitrarily placed. By the early 19th century, most maritime countries had established their own prime meridians to aid in navigation. But on this date in 1884, delegates from 25 nations met at a conference in Washington, DC, where they established Greenwich as the international standard for mapping and timekeeping. The decision made sense, as the Greenwich meridian was already widely used. But there was one holdout: France abstained from the vote and used its own prime meridian for several decades before eventually joining other countries in recognizing the Greenwich meridian.Desktop Version

Aug 26, 2021What are these creatures?

No, this isn"t a still image from a sci-fi space opera. We"re offshore of Coffs Harbour, New South Wales, Australia, watching a Glaucus atlanticus, aka "sea swallow" or "blue sea dragon," snack on the poisonous tentacles of a Porpita porpita, aka "blue button." At the tips of the blue button"s tentacles are stinging cells called nematocysts, but the venom doesn"t deter the sea swallow. Instead, once the sea swallow ingests the blue button"s poison, it stores the venom in the tips of its own feather-like fingers called papillae. Would-be predators should think twice before biting the sea swallow. The poison concentrated in its papillae can kill a predator in seconds. If you come across either of these creatures washed ashore, don"t touch! While the stings aren"t deadly to humans, they can cause skin irritation.Desktop Version

Mar 14, 2020A circular celebration

It"s Pi Day, the day we celebrate the mathematical constant π. This day was chosen because today"s date, March 14, expressed numerically, matches the number"s first digits, 3.14. Pi represents the ratio of a circle"s circumference to its diameter. It can be used to compute the area and circumference of a circle, such as the circles that make up this bridge we"re looking at here in Copenhagen. (Who said math wasn"t useful in the real world?) Many people mark the day with activities based around mathematics—and most also serve pie. We can"t think of a more delicious way to study geometry.Desktop Version

Sep 18, 2022World Bamboo Day

One of the most photographed places in Japan is this otherworldly grove of towering bamboo. The Arashiyama Bamboo Grove on the outskirts of Kyoto is surrounded by temples and shrines along the Katsura River. Rising as a manicured oasis of stories-high bamboo, the grove seems to turn the world green. The former villas and temples of the old noble class are located near the Arashiyama Grove, and its single 500-yard path is usually filled with visitors wielding cameras and selfie sticks, making this serene view a rare one.Desktop Version

Sep 26, 2018Art in the chapel

You have until Oct 31 to get to Governors Island in New York Harbor to see artist Jacob Hashimoto’s installation ‘The Eclipse.’ The Colorado native built this room-filling artwork out of rice-paper and bamboo kites, stringing the delicate pieces across the ceiling of the Chapel of St. Cornelius. ‘The Eclipse’ is accompanied by another of the artist’s works, ‘Never Comes Tomorrow,’ which is on display in Liggett Hall Archway, also on the island.Desktop Version

Sep 13, 2020Super sandy Sweet 16

We"re in the Rockies of southern Colorado to celebrate Great Sand Dunes National Park and Preserve"s 16th year as a full-fledged national park—though it was a national monument from 1932, and both the dunes themselves and the surrounding valley"s history are far more ancient.Desktop Version

Apr 24, 2021A garden of prickly delights

To celebrate the final weekend of National Park Week, we"re at Joshua Tree National Park in southeastern California, about a three-hour drive from Los Angeles. This 1,235-square-mile stretch of land where the Mojave and Colorado Deserts converge was declared a national monument in 1936, then was redesignated a national park in 1994. That status protects a wide variety of plant and animal life, including the eponymous Joshua tree, which can be found growing mostly in the hills on the Mojave side of the park.Desktop Version

May 18, 2019A ‘city’ within Valencia

Inspired by the City of Science and Industry in Paris, the Valencian Autonomous Government created the City of Arts and Sciences, enlisting the talents of architects Santiago Calatrava and Félix Candela to give the Spanish city a modern cultural attraction. Built in a park on the drained riverbed of the Turia River, the first portions of the multi-building attraction opened in 1998. Several additions followed, the most recent being L"Àgora, a covered plaza that opened in 2009 to host concerts, exhibitions, and other events.Desktop Version

Aug 20, 2020Up in the Highlands

There"s a good chance the occupants of that car you can see in this photo, winding along a remote highway in the Highlands of Iceland, won"t encounter any other visitors to this desolate region. Accessible only during the summertime, roads across the Icelandic Highlands pass through mostly uninhabited volcanic desert. Frequent volcanic activity in the area creates a porous topsoil full of chemical compounds that aren"t conducive to plant growth. Besides, much of the rainfall is quickly absorbed so plant life only appears alongside glacial rivers. Despite this seemingly unwelcoming environment, adventurous travelers come to the Highlands every summer to see firsthand an ecosystem so unearthly that NASA conducted training missions here for some of its Apollo astronauts.Desktop Version

Dec 12, 2020What are we looking at?

On National Poinsettia Day we"re taking an up-close look at a poinsettia leaf. Although many people assume the red, white, pink, purple, or marbled colors are flowers, they"re actually bracts, a type of leaf that aids in reproduction, usually by turning color as the plant develops true flowers. On the poinsettia, the bracts, surrounding small yellow clustered buds called cyathia, flag down pollinators just as flower petals do.Desktop Version

Jun 29, 2021An island hopper s paradise

Welcome to sunny and sultry Seychelles, a tropical island nation just south of the equator in the Indian Ocean, roughly 900 miles off the eastern coast of Africa. The gorgeous beach you see here is Anse Source d"Argent on the island of La Digue, one of 115 islands that make up this tropical republic. Anse Source d"Argent has long been a favorite of photographers, who are drawn to its contoured, dark granite boulders, pristine white sand, and turquoise-colored water. Beachcombers and sun worshippers also flock to the Seychelles because of their consistently great weather—daily high temperatures almost always stay within a comfortable range of between 75 and 90 degrees Fahrenheit all year round.Desktop Version

Oct 17, 2018Let’s talk fossils

Was there a time in your childhood when you told your parents, ‘I want to study dinosaurs when I grow up!’? On National Fossil Day, we encourage you to channel that childhood curiosity. The event, a celebration of paleontology, often includes events at local museums, parks, and schools. Participants may get to see amazing remnants of the past, such as the dinosaur tracks on our homepage, which were photographed near Tuba City, Arizona, in the Navajo Nation.Desktop Version

Nov 16, 2019Mountain mists over Bavaria

In modern German, the word for this month is "November." But an older German name was "Nebel-mond," which translates as "fog month" in English—it"s the time of the year when fog is most likely to roll in. In some parts of the world the topography and local climate make fog a regular feature of the weather, especially during certain times of the year. That’s called "fog season." San Francisco has a fog season. Tampa, Florida, does too. Is there a fog season where you live?Desktop Version

Jan 1, 2023New Year s Day

If your first scheduled activity of the day has ever involved intentionally jumping into an icy lake or a frigid bay, then you understand the relevance of today"s image from the Svalbard Islands of Norway. Polar bear plunges, as these swims have come to be known, take place all over the world, often on New Year"s Day. Whether people take the plunge for charity, penance, or shock value, there"s no better way to put an exclamation point on the first day of the year. Of course, for actual polar bears, ice cold plunges are an everyday occurrence and won"t elicit much more than a yawn.Desktop Version

Feb 14, 2020Two rocks and a heart spot

If you really want to earn someone"s affections, fly them to Corsica, rent a car, and take a drive on the only road that cuts through the red volcanic rocks of Calanques de Piana. Some call the naturally occurring rock formation in today"s Valentine"s Day photo "the two lovers," while others call it "the heart of Corsica." (Spot the heart?) Like most affairs of the heart, the path to this geological valentine is circuitous—it"s a winding road, sometimes too narrow to share with oncoming vehicles (the occasional pullovers help). Our vantage point may be a good spot for you to pull over, especially if it"s sunset, to see the rocks aglow as the sun creeps west toward the horizon.Desktop Version

Nov 17, 2020Take a hike near Lovers Lane

For those of you who love getting outside, you"re in luck! Today is Take a Hike Day, an activity the American Hiking Society says will make you happier as you enjoy the great outdoors. And what better way to take a hike than a walk near Lovers" Lane in San Francisco"s Presidio? The sinuous trail we see in today"s photo is called "Wood Line" and was designed by the environmental artist Andy Goldsworthy. By using felled eucalyptus trees, Goldsworthy intended this land art to eventually biodegrade and fade back into the forest floor. It"s one of four of his works within this national park that once served as a US military outpost.Desktop Version

Aug 20, 2018Looking back at Yellowstone, 30 years after the fires

Nature’s resiliency is on full display here at Yellowstone National Park, where new growth has emerged among the trees charred by the massive 1988 wildfires. More than 1 million acres in the greater Yellowstone area were affected by the blazes that summer, scarring 36 percent of the park. Today marks the 30-year anniversary of Black Saturday, a day when the park saw some of the worst damage, with smoke and ash blackening the skies. But when cool, moist weather brought an end to the devastating fires in late autumn, the ecosystem immediately began to recover. Fire has long been part of the complex ecosystem at Yellowstone and many species have even adapted to rely on fire to open up the canopy, spread seeds, and diversify the habitat.Desktop Version

Oct 28, 2019A night on the (ghost) town

The spooky scene here might look like a place you"d want to avoid, but it"s not likely to scare you—not too much anyway. It"s the Fort Rock Valley Historical Homestead Museum in central Oregon, a collection of abandoned homestead-era buildings from the area. In the late 19th and early 20th centuries, people acquired federal lands around here for farms and ranches via the Homestead Acts. But most left within a few years due to the hot, dry summers and extremely cold winters. Today, the buildings are assembled as a ghost town and contain items from that period, including furniture, dishes, and tools. There"s also a nearby cemetery which, according to local lore, is haunted by the ghost of rancher and author Reub Long riding his horse.Desktop Version

Sep 12, 2018A cutting-edge art gallery opens in Paris

Fine art has found a new canvas here in Paris, where L’Atelier des Lumières opened in April as the city’s first digital art museum. The venue, housed in a 19th-century foundry, uses 140 digital projectors to splash paintings high onto the walls and across the floors, allowing visitors to walk through, over, and into some of the world’s most famous pieces of art. L’Atelier des Lumières opened with an exhibit featuring works by Gustav Klimt, the prominent Austrian painter best known for ‘The Kiss,’ a portrait of a couple locked in an intimate embrace. Klimt was known for incorporating silver and gold leaf into his art nouveau-style oil paintings, creating an ethereal effect.Desktop Version

Dec 2, 2021Denali National Park

Someone ought to tell these Dall sheep they don"t blend in here at Polychrome Pass. Their white coats may be great camouflage against the Alaskan snows, but the warm tones of this tundra make them stick out a bit. And they aren"t the only thing sticking out in this national park: It"s home to the tallest mountain in North America.Desktop Version

Sep 25, 2020One for the books

Today is the kickoff to the 20th Library of Congress National Book Festival, and for the first time it will be held entirely online. Nearly 120 authors, including Colson Whitehead, John Grisham, Ann Patchett, Walter Mosley, and Tomi Adeyemi, will appear on virtual stages to discuss the written word from September 25-27.Desktop Version

Jul 30, 2021Working for that cliffside view

Maine"s Acadia National Park serves up spectacular views at most every turn. But the park"s Otter Cliffs on Mount Desert Island offer the adventurous among us a chance to take in the picturesque Atlantic shoreline from the edge of a sheer granite wall. Rising some 60 feet above the crashing waves below, the cliffs are shown here at low tide—when the tide is up, that ledge at the bottom is completely submerged.Desktop Version

Nov 20, 2019Atop the roof of Africa

From their home in the Simien Mountains of Ethiopia, these rare gelada monkeys look like they"re on top of the world. Simien Mountains National Park has some of the highest elevations in all of Africa, marked by deep valleys, jagged mountains, and sheer cliffs. This harsh climate nurtures rare and endangered species, including our homepage friends. The gelada monkey lives only here in the Ethiopian Highlands, where it survives on a diet of mostly various grasses. Nicknamed the "bleeding-heart monkey," it"s recognizable by the bright red, hourglass-shaped patch on its chest. It has another claim to fame: This chatty species produces a diverse range of vocalizations so complex they"re thought to be similar to those of humans. So, what do you think they"re talking about?Desktop Version

Dec 25, 2020Big dreams require a big sleigh

For Christmas Day, we traveled 217 miles north of the Arctic Circle to Ilulissat, Greenland. It"s the island"s third-largest city, though in almost any other region, it would be considered a small town—only 4,670 people live here. Until a few years ago, Ilulissat served as a key destination for that most important holiday correspondence: Thousands of letters sent from around the world to Santa Claus, North Pole, ended up being rerouted to this giant mailbox. Today the mailbox has moved farther north, to Uummannaq, ever closer to the jolly old elf"s magical domicile. If you"re celebrating Christmas today, we hope you have a merry one.Desktop Version

Mar 7, 2021Finding a balance between wetlands and water treatment

Take a stroll through the Wakodahatchee Wetlands and you"ll likely spot great blue herons, like the fluffed-up pair we"re featuring today. Located in Delray Beach, Florida, and created on 50 acres of wastewater utility property, the park first opened to the public back in 1996. A three-quarter-mile boardwalk takes visitors over ponds and through marshes, offering the chance to see more than 150 bird species, plus turtles, fish, frogs, alligators, and other Floridian fauna. Every day, the Palm Beach County Water Utilities Department pumps about 2 million gallons of highly treated wastewater into the wetlands. Then algae and other plants naturally finish the purification process before the water seeps back into the water table. Quite an upgrade from a yucky wastewater pond.Desktop Version

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