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Celebrating Pi Day
Celebrating Pi Day
Calculating the ratio of a circle"s circumference to its diameter is as easy as pi. Today is Pi Day, an event that celebrates this mathematical constant. This date was chosen because 3, 1, and 4 are the first three significant figures of pi (π) when it is written out. Pi is an irrational number, which means that it can"t be written as a fraction. When written out, its decimal representation goes on infinitely without repeating. The oldest attempts to calculate pi date back to ancient Babylon and Egypt, around 1900 BCE.Desktop Version
Apple trees in spring, Germany
Apple trees in spring, Germany
In this picturesque orchard, spring heralds the blossoming of apple trees. As the chill in the air starts to fade, delicate apple blossoms unfurl, releasing a sweet fragrance that permeates the countryside. This marks the beginning of a process that culminates in the harvest of one of the world"s most beloved fruits. Known for their crisp texture and sweet-tart flavor, apples belong to the Rosaceae family. These fruits come in a variety of colors, from vibrant reds to golden yellows and bright greens. Each type boasts its unique flavor profile, from the tangy Granny Smith to the sweetness of Fuji. These fruits are rich in dietary fiber, antioxidants, and essential vitamins like vitamin C and vitamin K, promoting overall health and well-being. Whether you like them fresh, baked in your favorite desserts, or pressed into cider, apples are a classic culinary delight.Desktop Version
International Day of the Worlds Indigenous Peoples
International Day of the Worlds Indigenous Peoples
Today we are celebrating the heritage and culture of native populations worldwide. There are some 5,000 Indigenous cultures in 90 countries around the world, from Samoa and Greenland to New Zealand and Nepal. One of the major challenges they face is the loss of their languages: It"s estimated that of the 4,000 Indigenous languages in the world, around 2,600 are in danger of becoming extinct.Desktop Version
Arbor Day
Arbor Day
The first Arbor Day in the US was held in 1872. Since then, the event has really taken root. On the last Friday of April, people across the country mark the occasion by planting trees, often dedicating them to a loved one. It"s also a great day to celebrate trees themselves. As well as providing homes for countless species of animals, trees absorb carbon dioxide and clean the air we breathe. They also help to keep cities cooler and can even play a role in preventing floods.Desktop Version
Happy World Whale Day!
Happy World Whale Day!
On the third Sunday of February, World Whale Day highlights the beauty of whales and the challenges they face. This year, on February 16, we honor these majestic creatures, like the humpback whale pictured in today"s image, known for its enchanting songs and dramatic breaches. World Whale Day began in 1980 in Maui, Hawaii, led by Greg Kauffman of the Pacific Whale Foundation, to protect humpbacks from extinction. Today, it urges global action on threats like ocean pollution, climate change, and habitat loss.Desktop Version
International Archaeology Day
International Archaeology Day
Today, dig deep and unearth your inner Indiana Jones or Lara Croft on International Archaeology Day. The event celebrates archaeology"s benefits for society, and includes exhibits and hands-on excavations, some of which run throughout the month. Many US national and state parks, historic landmarks, and local museums also hold events.Desktop Version
African bush elephants in Namibia
African bush elephants in Namibia
Desert elephants, found in Namibia and Mali, are African bush elephants that have adapted to the harsh conditions of the Namib and Sahara deserts. These extremely arid regions receive less than 2.75 inches of annual rainfall. Compared to other bush elephants, desert elephants have longer legs, broader feet, and slightly smaller bodies. These resilient herbivores migrate between waterholes, following ancient routes based on seasonal food and water availability. Male desert elephants often roam alone over vast areas, while female-led family groups stay near rivers, where food is more plentiful. Their incredible adaptability is showcased by their ability to travel long distances, sometimes 43 miles in a single night, to find their favorite myrrh bushes.Desktop Version
Black-naped monarch
Black-naped monarch
Watch closely; you might catch a glimpse of the black-naped monarch. This bird is part of the monarch flycatcher family, which also includes shrikebills, magpie-larks, and paradise flycatchers. Found across tropical southern Asia, from Iran and Sri Lanka to Indonesia and the Philippines, the black-naped monarch prefers dense forests and other lush, wooded spots. It perches upright on its short legs and spends most of its time catching insects in midair. These birds occupy the dense understory of the forest canopy.Desktop Version
Happy Fat Tuesday!
Happy Fat Tuesday!
Mardi Gras, or "Fat Tuesday," is a vibrant tradition that marks the last day of indulgence before the Christian season of Lent begins on Ash Wednesday. Rooted in ancient Roman celebrations like Saturnalia, Mardi Gras evolved as Christianity spread, blending local customs—most notably Carnival festivities—with religious observances. The name itself originates from French, with the word gras meaning "fat," referring to rich, fatty foods like meat, eggs, and cheese that are traditionally enjoyed before the fasting season begins.Desktop Version
Collared aracari in Costa Rica
Collared aracari in Costa Rica
Black and yellow plumage, bright eyes, and an oversized bill—meet the collared aracari, a fascinating tropical bird. Gracing the forests from Mexico through Costa Rica, where today"s image was taken, to Colombia and Venezuela, this toucan gets its name from the red marking on the back of the neck. These birds circle through the air in groups of up to 15, and at night, snuggle together in tree cavities. Their song is as unique as their look—a high squeaky note that sounds like "seek," sometimes a "purr" or even a raspy "grhhrr." Although deforestation and hunting pose threats to these birds, they are not endangered. For now, collared aracaris remain a captivating sight, a splash of color, and a burst of life amid the sprawling branches.Desktop Version
National Fossil Day
National Fossil Day
For National Fossil Day, we"re looking at the mesmerizing Painted Hills, found in the John Day Fossil Beds National Monument in Oregon. Those stripes of red, tan, orange, and black were formed over tens of millions of years, the different layers in the claystone hills reflecting changes in the climate over that period. The monument itself is divided into three units, Painted Hills, Clarno, and Sheep Rock. In the latter, you"ll find the Thomas Condon Visitor Center with a paleontology lab and a museum displaying hundreds of fossils. In the fossil beds, the remains of more than 100 species of mammals have been found, including saber-toothed tigers, turtles, and opossums, as well as many fossilized plant species. While the landscape might sometimes look otherworldly, it offers us a peek into Earth"s dynamic and fascinating history.Desktop Version
Happy St. Patricks Day!
Happy St. Patricks Day!
St. Patrick"s Day, celebrated on March 17, honors Ireland"s patron saint and national apostle, Saint Patrick—a fifth-century missionary. A national holiday in Ireland, the festivity is marked by a range of cultural events, parades, and traditional music and dance enjoyed across the globe. Interestingly, the first St. Patrick"s Day parade wasn"t held in Ireland but in the US. The earliest celebration was organized by Irish vicar Ricardo Artur in St. Augustine, Florida, in 1601.Desktop Version
International Dark Sky Week
International Dark Sky Week
Imagine standing under a sky so dark that the Milky Way stretches across it like a luminous ribbon. This is the experience that International Dark Sky Week aims to bring back. Every April, during the week of the new moon (this year from April 21 to 27), we are invited to turn off our lights and gaze at the stars. The event was initiated by Jennifer Barlow, a high school student in 2003, to combat light pollution. One of the best places to experience the night sky"s beauty is Joshua Tree National Park in southeastern California, an International Dark Sky Park. Here, the absence of artificial light allows visitors to see the stars as our ancestors once did. Did you know that light pollution prevents us from seeing most of the stars in the Milky Way? By reducing it, we can reconnect with the universe"s beauty and wonder.Desktop Version
World Elephant Day
World Elephant Day
Get ready to celebrate elephants, the largest living land animals. There are three elephant species alive today: African bush, African forest, and Asian. All three species are endangered, and World Elephant Day is dedicated to highlighting the challenges they face, like the ivory trade and habitat loss.Desktop Version
Veterans Day
Veterans Day
Freedom is not free, and nobody understands that better than veterans. Today, America honors its military men and women for their service. The holiday originally celebrated a temporary halt in fighting between Allied nations and Germany during World War I—the official end of the war came the following year in 1919. Armistice Day, as it was later named, commemorated this respite, and it became a federal holiday in 1938. A few years later, America fought in World War II, and later, the Korean War. As a result, Congress amended the holiday in 1954, exchanging the word "Armistice" with "Veterans" to include veterans of all the country"s wars.Desktop Version
Earth Day
Earth Day
Today is Earth Day—a day dedicated to celebrating the planet we call home and raising awareness of environmental problems. The seeds of this day were planted back in 1969 when Senator Gaylord Nelson of Wisconsin witnessed events like the Cuyahoga River catching fire and the Santa Barbara oil spill and decided that the world needed an environmental initiative. A year later, the first Earth Day event was held. Now, it has grown into an annual event with more than a billion people in over 193 countries taking part.Desktop Version
Indigenous Peoples Day
Indigenous Peoples Day
Our homepage today celebrates Indigenous Peoples" Day. In the US, the second Monday in October is dedicated to the enduring cultures that have shaped the nation. Among them are the Fremont people, who lived in and around what is now Utah, for more than 1,000 years up to 1300 CE. This broad group of communities left a lasting mark on their region with their distinctive petroglyphs, a form of ancient art chipped or carved into rock. Today, many Americans participate in Indigenous Day celebrations such as art exhibitions, traditional music, and storytelling. Locations such as Dinosaur National Monument, Fremont Indian State Park, and McKee Spring provide insights into the history of this ancient culture that lived here for centuries.Desktop Version
Lake Magadi, Kenya
Lake Magadi, Kenya
What an unearthly view! This aerial photograph shows a flamboyance of lesser flamingos against the backdrop of Lake Magadi in Kenya. The lesser flamingo is one of six species of flamingo, a bird known for its vibrant pink plumage and distinctive feeding behavior. They use their specialized beaks to filter algae near the water"s surface and are often found in African soda lakes like Lake Magadi, which are brimming with cyanobacteria and algae for them to eat. The spectacle of thousands of these avian wonders congregating at the lake reveals the importance of these unique ecosystems.Desktop Version
The Great Blue Hole, Belize
The Great Blue Hole, Belize
The Great Blue Hole, found near the center of Lighthouse Reef off the coast of Belize, is one of nature"s most incredible creations. The massive marine sinkhole, 1,043 feet across and 407 feet deep, was formed during the last ice age when a limestone cave system collapsed and rising sea levels flooded the area, leaving behind a striking natural wonder.Desktop Version
Grandparents Day
Grandparents Day
Have you called your nana, abuela, pop-pop or lolo lately? No matter what you call them, there"s no better time to pick up the phone than Grandparents" Day, held on the Sunday after Labor Day. Grandparents play a special role in our lives, helping to raise new generations, passing down family history and sharing the wisdom of their experience. Wisdom is not always indicated by a thick Wilford-Brimley-esque mustache, but whiskers do lend a certain esteemed quality. Perhaps that"s why these Atlantic walruses look like they"re about to tell you why they voted for Hubert Humphrey.Desktop Version
Royal Alcázar of Seville, Spain
Royal Alcázar of Seville, Spain
Today we"re stepping into the heart of the historic empire of Islamic Spain. The Royal Alcázar of Seville, in the southern region of Andalusia, stands on the site of a 10th-century citadel, which was expanded over the following 200 years. When Christian forces captured the city in 1248, this historic palace was almost totally rebuilt in the Mudejar style, which takes inspiration from the intricate patterns and decorative motifs found in Islamic architecture. Within the Alcázar, there are several courtyards lined with delicately carved columns. One of these is the Patio de las Doncellas, or Courtyard of the Maidens, pictured here today.Desktop Version
Presidents Day
Presidents Day
Presidents" Day, celebrated on the third Monday in February, is a time for Americans to reflect on the legacies of those who have served in the country"s highest office. The day is officially Washington"s Birthday at the federal level, but it has evolved into a celebration that recognizes the achievements of all US presidents. Parades and patriotic displays are held across the country, and many people take the opportunity to learn about presidential history.Desktop Version
Lei Day
Lei Day
As the first day of May dawns in Hawaii, Lei Day bursts forth in a riot of color, fragrance, and festivity. Leis are garlands crafted from flowers, leaves, and even shells, carrying significant cultural importance in Hawaiian culture. Leis were brought by the Polynesians as they migrated eastward through the Pacific Islands before reaching Hawaii between 1000 and 1200 CE. They represent love, respect, and the ever-present aloha spirit, described as "the coordination of mind and heart within each person." Lei Day is an all-day fiesta that includes parades, pageants, lei-making contests, hula dances, and feasts. It also marks the beginning of Asian American and Pacific Islander Heritage Month.Desktop Version
World Octopus Day
World Octopus Day
What exactly are we looking at here? The veined octopus, also known as the coconut octopus, is one of the smartest animals on Earth, building shelters from seashells and coconut shells. If you peek inside, you may spot those telltale suction cups that cover the creature"s eight limbs. These arms contain clusters of neurons, which make them particularly sensitive, and each arm can be used separately to perform complex tasks. Octopuses can also match the color—sometimes even the texture—of their environment, making them even more difficult to spot. There"s lots more to learn about these fascinating animals, and World Octopus Day is a great day to do it. You could always start with the Academy Award-winning documentary "My Octopus Teacher."Desktop Version
Happy Easter!
Happy Easter!
Today is a special day for billions of Christians worldwide—a time of renewal, celebration, and traditions. Easter, also called Pascha or Resurrection Sunday, commemorates the resurrection of Jesus Christ as described in the New Testament. It"s also a time for festive traditions, from sunrise services to Easter egg hunts and, of course, the beloved Easter Bunny.Desktop Version