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Water colors
Water colors
Xiechi Lake in Yuncheng, China, has such a high level of salinity, it"s sometimes called China"s Dead Sea. But unlike the Dead Sea in the Middle East, Xiechi Lake supports abundant microscopic life: algae and other microorganisms that have a high tolerance for the salt. In summer and autumn, the lake temperature is high enough to spark algae blooms, bringing a variety of intense colors to the lake water.Desktop Version
Birthplace of Roman emperors
Birthplace of Roman emperors
Just a few miles north of Seville, Spain, you"ll find the ancient ruins of Itálica, the first Roman city outside of Italy. The city was founded in 206 BCE by the Roman general Scipio as a place to house veterans from the Second Punic Wars. Itálica was also the birthplace of at least two Roman emperors.Desktop Version
Take this for a spin...
Take this for a spin...
In 1851, when French physicist Léon Foucault performed his pendulum experiment in Paris, he became the first to prove what many scientists of his day already suspected—that the Earth spins on an axis. He conducted his first experiments 170 years ago, in early January 1851, with a relatively small prototype in the cellar of his home. Just a month later, Foucault performed his most famous pendulum demonstration, using a 62-pound spherical weight attached to a 220-foot wire, which was hung from the dome of the Panthéon, a Parisian monument. As the pendulum swung back and forth in a fixed plane, the pointed end of the weight traced lines in a compass-like circle of sand below it. As time passed, the angle of these lines began to change, demonstrating to onlookers that the Earth itself was rotating underneath the pendulum, and by extension, everyone watching was rotating as well, spinning on the surface of the great blue marble around its axis.Desktop Version
It s ∞ Day!
It s ∞ Day!
Gustave Flaubert wrote that "an infinity of passion can be contained in one minute." So, if you have boundless passion for contemplating the immeasurable, a full day should offer plenty of time. August 8 (8/8) is Infinity Day since the numeral 8 looks like a tilted ∞, the common symbol for infinity first popularized in 17th-century math books. But the concept of infinity itself represents an idea much older, inherent in the countless spiritual traditions that revere eternal gods or outline endless life cycles.Desktop Version
Bird s-eye view on World Environment Day
Bird s-eye view on World Environment Day
For World Environment Day today we"re in northeastern Costa Rica, a nature lover"s paradise. The UN established World Environment Day in 1974 to encourage awareness and action for the protection of the environment. It begins with research, which is exactly what happens in this pristine corner of the planet. The misty canopy of forest pictured here is part of La Selva Biological Station, an internationally renowned center for tropical forest research that"s associated with universities and research institutions in the United States, Costa Rica, and Puerto Rico.Desktop Version
Dashing through the snow
Dashing through the snow
While many associate reindeer with the wonder of the holidays, these animals are magical in their own way. Known in North America as caribou, reindeer are well adapted to live in cold, rugged Arctic regions, like northern Norway where this herd was photographed. They"re built to withstand frigid temperatures with the help of thick, dense fur and noses that warm the air before they breathe it in.Desktop Version
A courtyard scene from Spain
A courtyard scene from Spain
For centuries people have lavishly decorated the courtyards of Córdoba, in southern Spain"s Andalusia region. Here in the San Basilio neighborhood of the city’s old town, the densely packed whitewashed houses look out onto courtyards and patios embellished by hanging flowerpots and trailing plants. The sculpture on today’s homepage, by artist José Manuel Belmonte, pays homage to the caretakers who pass along the tradition.Desktop Version
Feeling lazy? Today s your day.
Feeling lazy? Today s your day.
Isn"t it odd that many of us don"t have to work on Labor Day, but International Sloth Day is just another Wednesday? If you"re moving slowly today, that"s just fine: You"re outpacing today"s homepage subject, which spends 90% of its time scarcely moving a muscle.Desktop Version
Don t forget—it’s World Elephant Day
Don t forget—it’s World Elephant Day
Today for World Elephant Day, we"re at Amboseli National Park in Kenya, one of the best places in the world to see African elephants ambling on the savannah. (The views of Mount Kilimanjaro aren"t too bad either.) The 151-square mile park, which has helped protect elephants and other African animals since it was established in 1974, is home to about 900 savannah elephants. The African elephants seen here may be enjoying their special day today, but they won’t be jumping up and down to celebrate—they weigh an average of 12,000 pounds, so they stay firmly on the ground.Desktop Version
Vote!
Vote!
It"s Election Day, so if you"re eligible to vote but haven"t already voted, stop reading this and go cast your ballot. In 1845, Congress decided that general elections of federal public officials would be held on the Tuesday after the first Monday in November. Why a Tuesday? In the 1800s, most citizens worked as farmers and lived far from their polling places, so they needed a day or two to travel. Many Americans went to church on Sunday, and Wednesday was their day at the market. So, Tuesday was the most practical.Desktop Version
Freeze frame
Freeze frame
A lot of work goes into taking great photos, as this emperor penguin can attest. The best photographers find the right location, have mastery over their equipment, and ensure they"re ready when the magic happens. Of course, it helps to recognize a chance at an unusual shot, like when curious emperor penguins in Antarctica invite themselves to your shoot.Desktop Version
An improbable tribute for Towel Day
An improbable tribute for Towel Day
"Space," Douglas Adams observed in his comic sci-fi novel "The Hitchhiker"s Guide to the Galaxy," "is big. Really big. You just won"t believe how vastly hugely mind-bogglingly big it is. I mean, you might think it"s a long way down the road to the chemist, but that"s just peanuts to space." So, in his fictional universe, Adams invented the Infinite Improbability Drive as a way to cross its vast distances in a nothingth of a second. And, in one memorable passage, to convert two approaching nuclear missiles into a bowl of petunias and a sperm whale. Thus, today"s image of the Earth"s largest toothed whale is our tribute to Adams on the 20th annual celebration of Towel Day (it"s surprisingly difficult to find a really great image of a bowl of petunias).Desktop Version
Oymyakon, Russia
Oymyakon, Russia
Oymyakon, Russia, is one of a few places claiming to be the coldest spot in the Northern Hemisphere, a northern "Pole of Cold." Centuries of evolving meteorological technology means some historic cold temperatures are considered more accurate than others. The record for ultimate cold is a hot debate.Desktop Version
Remembering Krakatoa
Remembering Krakatoa
Over two days in late August 1883, Krakatoa—an uninhabited island near Indonesia—experienced one of the most destructive volcanic eruptions of modern times. Ten times more powerful than the eruption of Mount St. Helens, it obliterated all but a third of the island and triggered massive tsunamis. The biggest blast could be heard 3,000 miles away—it’s still the loudest sound ever recorded. More than 36,000 people lost their lives, and the explosions impacted the entire world for years: Global temperatures dropped and skies darkened, causing huge crop failures. Sunsets turned a vivid red and the moon often appeared blue or green after the event due to the volcanic debris circling in the atmosphere.Desktop Version
Mount Pico, Portugal
Mount Pico, Portugal
At almost 8,000 feet above sea level, Mount Pico is the highest point in the Azores, a collection of volcanic islands in the Atlantic Ocean that are an autonomous region of Portugal. Back in 1562, an eruption here on Pico Island lasted for more than two years, but this stratovolcano has been lying dormant since 1720.Desktop Version
Grab onto the handlebars, kid
Grab onto the handlebars, kid
How does a bearded tamarin celebrate Father"s Day? Maybe by giving piggyback rides to pint-sized monkeys. From day one, both male and female bearded emperor tamarin babies (like the one hitching a ride in this photo), start growing their trademark handlebar mustaches and wispy beards. These diminutive residents of the Amazon basin are highly social animals. Females often give birth to twins and stay pretty busy during the day nursing them. After the babies are fed, the males watch over the youngsters by carrying them around on their backs. By the time the young tamarins reach two months old their pops become the primary caregivers, providing food and showing the ropes of the rainforest to their young charges—where to find fruit and nectar in the dry season, how to leap from branch to branch, and the best ways to groom those outrageous mustaches and beards.Desktop Version
Just another day in paradise
Just another day in paradise
It takes some effort to reach the stunning Nā Pali Coast on the Hawaiian island of Kauai. Located on the island"s northwest side and stretching about 16 miles, Nā Pali isn"t accessible by car. You have to hike in, fly in by helicopter, or come at it from the sea by boat. In the summer, when the waves are calm, you can explore the rugged coast by kayak, but you"ll need a solid supply of muscle power for the sometimes-grueling paddle. If you seek a gentler approach—and if COVID restrictions allow—book a boat trip to explore the interiors of the sea caves that dot the shore. Today, we"re looking down on the Bright Eye sea cave, one of several caves on the Nā Pali Coast that lost their ceilings to the pounding of the sea.Desktop Version
Art over Amalfi
Art over Amalfi
For centuries, Amalfi was the capital of a busy maritime republic in the Mediterranean basin. Over time, its importance as a port diminished and Amalfi became a popular Italian tourist destination. But the city’s history from at least the 7th century to the present got the attention of the United Nations, which gave the Amalfi Coast UNESCO Heritage Site status in 1997. So, if you’re observing United Nations Day today, we’re celebrating with you. This art installation depicting a flock of doves was suspended over the Piazza del Duomo, just outside Saint Andrew’s Cathedral in Amalfi.Desktop Version
Whoopin it up!
Whoopin it up!
For Endangered Species Day, celebrated annually on the third Friday of May, we"re featuring the whooping crane, one of only two crane species found in North America. Once seen throughout midwestern North America, whooping cranes were driven perilously close to extinction by the early 1940s, with fewer than two dozen birds in the wild. Thanks to conservation efforts, their numbers have now risen to more than 600. While that"s good news, this limited recovery is still fragile, and these incredible creatures remain imperiled, particularly by the loss of their wetland habitat.Desktop Version
Celebrating Bike to Work Week, May 14-18
Celebrating Bike to Work Week, May 14-18
If you need some inspiration for National Bike to Work Week, we present the racers of the Maratona dles Dolomites road race. The most dedicated of these competitors will pedal over seven mountain passes as they ride 85 miles through the Dolomite mountains of Italy. But hey, even if you’re simply biking a few miles in honor of Bike to Work Week, we commend you. The event is sponsored by the League of American Bicyclists, a group that touts the many benefits of cycling–good health, strong communities, and a healthy environment.Desktop Version
Welcome to Scotland s garden
Welcome to Scotland s garden
Today, we"re in the "Garden of Scotland," better known as the East Lothian region, to pay homage to the area"s agricultural roots on Lammas Day. Also known as Loaf Mass Day, it"s an observance that marks the beginning of the harvest season and is traditionally celebrated on August 1. The holiday is descended from the ancient British tradition known during the Middle Ages as the Gule of August and was gradually incorporated into the Christian liturgy celebrating Holy Communion. It gets its name from loaves of bread baked from the first harvested grain of the season each year.Desktop Version
Celebrating the Day of the Dead
Celebrating the Day of the Dead
Whether made of wood, clay, or even candy, Day of the Dead skeleton figures, called calacas, share one common trait: They’re having fun. The reason for the whimsical portrayal of death is a holdover from the Aztec influence on Mexican culture. According to traditional beliefs, the dead don’t want to be remembered with sadness, but rather with the joy they brought to the world when they were alive. Today is the height of the three-day celebration, which begins with All Saints Eve on October 31, continues with All Saints Day (today), and ends with All Souls Day on November 2.Desktop Version
3,000 years of history
3,000 years of history
These massive temples—known today as Abu Simbel—were built in the 13th century BCE by the pharaoh Ramesses II. He left a legacy of monuments and temples across Egypt, many of which, like Abu Simbel, featured Ramesses II himself as the star attraction. But over the centuries, these temples were almost completely buried in sand and forgotten. It was not until the early 1800s when an explorer saw the heads of the colossal statues poking through the sand that the temples were again discovered. Then in the 20th century, construction of a dam on the Nile River formed Lake Nasser, a massive reservoir that would have flooded the site where the temples stood. To save them from inundation, the temples were disassembled and relocated to a nearby hill. The process took almost five years and required that workers cut the temples into pieces and reassemble them exactly as they were built 3,000 years ago. We think Ramesses II would approve.Desktop Version
Hut, hut, hike!
Hut, hut, hike!
Meerkats, also called suricates, are highly social animals that enjoy playing together and grooming each other. Members of the mongoose family, they live in mobs (yes, that"s what a group of meerkats is called) of 20 to 50 individuals that work together and share underground burrows to stay cool in the African heat.Desktop Version
In honor of those we ve lost
In honor of those we ve lost
Today we"re featuring the view from the Empty Sky memorial in Jersey City, New Jersey, across the Hudson River, to where the World Trade Center"s Twin Towers once stood in New York City"s lower Manhattan. The Empty Sky memorial honors the 749 people from New Jersey who were killed on September 11, 2001. Their names are etched on two massive steel walls that form a tunnel directing the visitor"s gaze to one of the sites of the deadliest terrorist attack in history. The name Empty Sky comes directly from a song by New Jersey"s favorite son, Bruce Springsteen, about the "empty sky" where the Twin Towers once stood before they were destroyed in the 9/11 attacks.Desktop Version