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A swim in the sky
A swim in the sky
A lap in the Sky Pool may have you holding your breath, and not just because you"re underwater. With the streets of London looming 10 stories down, the view through the pool"s clear bottom is a bit freaky to all but the fearless. But swimming here is a one-of-a-kind experience, and for some lucky residents of these twin apartment blocks near the US Embassy, a convenient way to pop in on neighbors the next building over.Desktop Version
A march toward a dream
A march toward a dream
For Martin Luther King Jr. Day, we"re going back to August 28, 1963, to the March on Washington. Among those in the front line of demonstrators are baseball great Jackie Robinson and bus-boycott activist Rosa Parks, both towering figures in the civil rights movement. Later this day, the Reverend Martin Luther King Jr. would deliver his "I Have a Dream" speech in front of a quarter-million protesters packed onto the National Mall. The speech is considered among the best in American history and a defining moment in the fight for civil rights. King was just 34 years old.Desktop Version
Let’s talk fossils
Let’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
What are these creatures?
What 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
A big place to shop small
A big place to shop small
Small Business Saturday started in 2010 to get shoppers out of the big box stores the day after Black Friday to support local retailers instead. The US is home to more than 30 million small businesses (500 employees or fewer), representing 47 percent of private sector employees. Of course, the concept of patronizing local merchants is nothing new. Here in Marrakesh, Morocco, souks (markets) like this one in Jemaa el-Fnaa Square have long been a big part of daily life, as well as major tourist attractions. During the day, musicians, dancers, and even snake charmers entertain shoppers as they search for crafts, clothing, and other goods. At night, the focus shifts to dining, with dozens of stalls offering different specialties and takes on traditional Moroccan food.Desktop Version
A circular celebration
A 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
Sleep tight, little hedgehog
Sleep tight, little hedgehog
Though they may seem exotic to most people in the Americas, wild hedgehogs are quite common in much of the rest of the world. The tiny creatures are usually nocturnal and use their spiky exteriors to protect themselves. Each hedgehog has about 6,000 quills, but the quills aren"t poisonous and don"t easily detach, like those of the also-quilled (but completely unrelated) porcupine.Desktop Version
A theatrical dream
A theatrical dream
The work of surrealist artist Salvador Dalí is the stuff of dreams: melting clocks, burning giraffes, weird objects suspended in midair. Gaze at a Dalí and you may find yourself gripped with a strange sense of familiarity, like your subconscious has visited this strange place before. But what if you could literally step into a huge Dalí piece?Desktop Version
Lake Tekapo, New Zealand
Lake Tekapo, New Zealand
Here on New Zealand"s rugged South Island, the waters of Lake Tekapo display such striking electric-blue colors because of glacial silt flowing into the lake, carried by the braided Godley and Macauley Rivers, seen at the bottom of our image. These rivers are themselves fed by the melted waters of glaciers in the nearby Southern Alps. As these active glaciers slowly bulldoze the mountainsides, they pulverize rocks along valley floors and walls. All that grinding eventually produces a fine-grained powder of silt, sometimes called glacial flour. Meltwater picks up the silt, carrying it downstream and into lakes like Tekapo. The particles are so light and fine, they"re slow to sink to the bottom, remaining suspended in the water column instead.Desktop Version
Art in the chapel
Art 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
Two rocks and a heart spot
Two 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
Goðafoss waterfall, Iceland
Goðafoss waterfall, Iceland
Goðafoss is one of the hundreds of show-stopping waterfalls Iceland is blessed with. And though it isn"t the island"s highest waterfall—that would be Morsarfoss at over 787 feet—or most powerful (the thundering Dettifoss), Goðafoss, has, within its swirling waters, its own story to tell.Desktop Version
Gazing upon Portraits of Change
Gazing upon Portraits of Change
For the start of Women"s History Month, we"ve come to Union Station in Washington, DC, to view a mosaic of historical photographs of thousands of American women who fought to win voting rights. The ratification of the 19th Amendment, on August 18, 1920, finally secured the legal right of women to vote, but this mainly benefited white women. Despite heroic contributions to achieve suffrage, Black, Indigenous, and other women of color continued to face barriers to voting in the form of poll taxes, restrictive local laws, and hostile intimidation. This mosaic, called "Our Story: Portraits of Change," attempts to show a more complex history of the fight for American women"s right to vote.Desktop Version
Golden Bridge, Bà Nà Hills, Da Nang, Vietnam
Golden Bridge, Bà Nà Hills, Da Nang, Vietnam
Two colossal stone hands cradle a shimmering, golden walkway, as though the mountains themselves are offering it to the sky. This is Cầu Vàng, or the Golden Bridge, a pedestrian bridge in the misty mountains near Da Nang in central Vietnam. Opened in 2018, the bridge quickly became a global sensation, captivating travelers with its unique design and awe-inspiring setting.Desktop Version
Just a couple of yellow-billed hornbills
Just a couple of yellow-billed hornbills
Southern yellow-billed hornbills live in the dry savannas of southern Africa. These two were photographed in South Africa"s Kruger National Park, one of the largest nature preserves on the continent. While hornbills tend to live and hunt alone, they do mate for life, maintaining a monogamous relationship year after year. And with a lifespan of 20 years in captivity, it"s entirely possible that there are some yellow-billed hornbill grandparents out there. Why do we mention that? Because we"re celebrating National Grandparents Day in the US today!Desktop Version
Cherry blossoms spring to life
Cherry blossoms spring to life
The National Cherry Blossom Festival is always a highlight of spring in our nation"s capital. It"s timed for the peak bloom date (usually the last week in March or first week of April) when most of the blossoms are open on the cherry trees that surround the Tidal Basin. The trees were originally a gift from Japan, planted in Washington in 1912. While some Cherry Blossom Festival events are virtual this year, the trees will decorate the city as usual—just as they do in this photo framing the Jefferson Memorial. This year"s festival began on March 20 and runs until April 11. It includes in-person tours and activities visitors can do on their own, as well as virtual viewings and an online Celebration Show that debuts on April 9.Desktop Version
It s time for spring
It s time for spring
This 40-foot sundial stands atop the Parnidis Dune, one of the scenic highlights of the Curonian Spit, a UNESCO World Heritage Site shared by Lithuania and Russia. Built in 1995, the sundial was damaged by a hurricane a few years later and rebuilt in 2011. It accurately tells time by creating shadows on the steps, with notches for hours and half hours, as well as months, equinoxes, and solstices.Desktop Version
Working for that cliffside view
Working 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
Mountain mists over Bavaria
Mountain 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
Up in the Highlands
Up 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
Super sandy Sweet 16
Super 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
One for the books
One 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
Behold the blood moon
Behold the blood moon
We"ve heard the phrase "many moons," but never took it this literally. We"re looking at 28 merged photos of our one and only moon over Utah"s Monument Valley: 26 snapshots of its partial phases, plus two layered exposures of the eclipsing moon at center.Desktop Version
Aura River in Turku, Finland
Aura River in Turku, Finland
The Turku Cathedral rises above the frosted forests near the mouth of the Aura River, which runs through the middle of Turku, Finland.Desktop Version
Finding a balance between wetlands and water treatment
Finding 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