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International Sloth Day
International Sloth Day
The world"s slowest mammal takes the spotlight today on International Sloth Day. Celebrated on October 20, it highlights their lives, conservation efforts, and the threats they face, including shrinking habitats. There are six living sloth species, divided into two types: three-toed sloths and two-toed sloths.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
Autumn in Central Park, New York
Autumn in Central Park, New York
Every autumn, many of the 18,000 trees in Central Park, New York, are painted in shades of yellow, red, and orange. It"s one of Central Park"s most photographed seasons, and fall in the park has provided iconic backdrops for movies like "When Harry Met Sally…" and "Hair." Trees sense the coming of winter not only by temperature, but by the angle at which sunlight hits their leaves. Because of New York"s buildings, the unique interaction of light, shadows, and temperatures often results in fall foliage occurring later in the park than the rest of the city.Desktop Version
Frost-covered dunes on Mars
Frost-covered dunes on Mars
Mars, the fourth planet from the sun, is often referred to as the "Red Planet" due to its rusty hue from the iron oxide-rich soil dust. The planet is dotted with frosty dunes, largely located in the high latitudes of the northern plains. Mars" atmosphere is composed of nearly 96% carbon dioxide, which is why carbon ice forms on the surface. These dunes showcase the dynamic interaction between Mars" thin atmosphere, its surface, and seasonal temperature changes.Desktop Version
National Fossil Day
National Fossil Day
If you"re a fan of dinosaurs, trilobites, or fossilized shells, then National Fossil Day is the perfect excuse to get your hands dirty. Celebrated on the second Wednesday of October, this day is dedicated to promoting the scientific and educational value of fossils. From towering T. rexes to tiny ammonites, these ancient remains help scientists piece together the puzzle of our planet"s history.Desktop Version
Great wildebeest migration at Mara River, Kenya
Great wildebeest migration at Mara River, Kenya
They say the grass is always greener on the other side, and no one takes that more literally than the wildebeests of the Serengeti in Tanzania. Every July, roughly 2 million of these determined grazers, along with zebras and other herbivores, set off on a journey north to the Masai Mara in Kenya in search of lush pastures and fresh water. The great migration, considered one of the seven wonders of the natural world, is a safari spectacle where survival is the prize.Desktop Version
Celebrating Indigenous Peoples Day
Celebrating Indigenous Peoples Day
The second Monday of October is used by many to celebrate Indigenous Peoples" Day, as an alternative to Columbus Day, held on the same date. It highlights the customs and heritage of the Indigenous Peoples who lived in North America before the arrival of European settlers, and the devastating impact colonization had upon them.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
World Migratory Bird Day
World Migratory Bird Day
Celebrate our traveling feathered friends on World Migratory Bird Day! Some migrations are truly astounding. The bar-tailed godwit embarks on a 6,835-mile nonstop flight across the Pacific from Alaska to New Zealand. The tiny ruby-throated hummingbird, weighing less than a nickel, makes the trip all the way across the Gulf of Mexico. Migratory birds navigate the globe, instinctively knowing when and where to move to exploit seasonal abundance. The Arctic tern outshines them all with its intercontinental journey from pole to pole, covering roughly 25,000 miles in its annual round trip.Desktop Version
Celtic Colours International Festival, Canada
Celtic Colours International Festival, Canada
The Celtic Colours International Festival begins today in Cape Breton, Nova Scotia, Canada. This festival celebrates the area"s inhabitants, including 19th-century settlers who came from Scotland and Ireland. Because of Cape Breton Island"s isolation and the lack of outside influences, the culture and traditions of these settlers remained particularly strong. Held when the island"s fall colors are most vibrant, the festival has blossomed into a nine-day extravaganza that coincides with the warm red, orange, and yellow autumn foliage.Desktop Version
Kochia, Hitachi, Ibaraki prefecture, Japan
Kochia, Hitachi, Ibaraki prefecture, Japan
This fiery tumbleweed is kochia, which transforms landscapes when it takes on hues of red, orange, and pink in the fall. In the spring and summer, this annual herb resembles a fluffy green ball. Native to parts of Europe and Asia, kochia, also known as "summer cypress," is now widespread throughout the world. But it has a special place in Japan"s Hitachi Seaside Park, seen in today"s image, where around 30,000–40,000 kochia bushes are planted each year. These ornamental plants create a surreal landscape for visitors to wander through and also hold significance in Japanese culture. Historically, they have been dried to create brooms. However, not all parts of the kochia are destined to sweep the Earth—some are used for food. The plant"s nuts, "tonburi," often called "field caviar," are a prized garnish.Desktop Version
Aspens in the White River National Forest, Colorado
Aspens in the White River National Forest, Colorado
Slender white trunks reaching skyward and leaves fluttering even in the gentlest breeze—aspen trees are a symbol of the American wilderness. Found across the western states, especially in Utah and Colorado, these trees are the most widespread native species in North America. Their fall foliage is breathtaking, with their leaves turning a vibrant yellow that lights up the landscape, as seen in today"s photo, which was taken in the White River National Forest, Colorado.Desktop Version
World Octopus Day
World Octopus Day
Today, we celebrate a creature with three hearts and the uncanny ability to change color at will: the octopus. Octopuses are cephalopods, marine animals like squids and cuttlefish that have tentacles. Among their many species is the small and shy mototi octopus, pictured here. It was discovered in 1999 around Rapa Island in the South Pacific and is known for the "fake eyes" or ocelli—vibrant blue and yellow rings—between its eyes and arms. Found in the Indo-Pacific region, including Indonesia, Australia, and Okinawa in Japan, mototi octopuses are masters of disguise. They usually have a dull orange-cream-brown color but when alarmed, they can quickly shift to striking maroon with white stripes along their body and arms. Also known as poison ocellate octopuses, these cephalopods are highly venomous. But you don"t need to worry about running into one, because they tend to be shy and solitary, often hiding in crevices, shells, or man-made objects like bottles and cans.Desktop Version
Elbphilharmonie concert hall in Hamburg, Germany
Elbphilharmonie concert hall in Hamburg, Germany
Build your excitement—it"s World Architecture Day! Today"s image features the Elbphilharmonie on the Grasbrook peninsula of the Elbe River in Hamburg, Germany. Designed by the Swiss architecture firm Herzog & de Meuron, this concert hall is a modern architectural marvel perched atop an old brick warehouse from 1963. A centerpiece of the new Hafencity development, it"s Hamburg"s tallest inhabited building—there are 45 luxury apartments in the upper floors—reaching a height of 354 feet.Desktop Version
Ancient town of Sorano, Tuscany, Italy
Ancient town of Sorano, Tuscany, Italy
Sorano is a serene medieval village perched atop a cliff in the Italian province of Grosseto, southern Tuscany. Walking through the age-old cobblestone streets, one can explore the Fortezza Orsini, a fortress-turned-museum that dates back to the 11th century. Visitors engage with centuries-old tales of power and defense with each step they take inside the fort. Near Poggio San Rocco and Poggio Croce hills lies a necropolis—a large, ancient burial site—with well-preserved Etruscan tombs that hint at the area"s long history. The Etruscan civilization inhabited this area and flourished in what is now Tuscany and Umbria between the 8th and 3rd centuries BCE.Desktop Version
World Teachers Day
World Teachers Day
Today we celebrate the real influencers—Happy World Teachers" Day! Every year on October 5, we recognize the essential role of teachers in nurturing young minds, while acknowledging the challenges they face.Desktop Version
World Space Week begins
World Space Week begins
Today, we"re blasting off to explore the cosmos. World Space Week celebrates the science and technology that go into exploring our universe, and how it benefits us back on Earth. Space exploration has helped scientists develop new medicines, create new power sources, and even improve farming techniques. This year"s theme is Space and Climate Change; events will be held in 83 countries to champion the role of space technology in understanding and monitoring Earth"s climate.Desktop Version
Taj Mahal, Agra, Uttar Pradesh, India
Taj Mahal, Agra, Uttar Pradesh, India
Let"s explore the Taj Mahal, on the banks of the Yamuna River in Agra, Uttar Pradesh, India. This ivory-white marble mausoleum was commissioned in 1631 by Shah Jahan, the fifth Mughal emperor, to honor his late wife, Mumtaz Mahal. It is one of the New Seven Wonders of the World.Desktop Version
Wild and Scenic Rivers Act
Wild and Scenic Rivers Act
Ever wonder how some of our rivers stay unspoiled? It"s thanks to the Wild and Scenic Rivers Act, which was signed into law on this day in 1968. This legislation created the National Wild and Scenic Rivers System which preserves rivers with exceptional natural, cultural, and recreational qualities.Desktop Version
Yosemite National Park anniversary
Yosemite National Park anniversary
There"s a reason why famed American photographer Ansel Adams fell in love with Yosemite National Park: vistas like today"s image of Half Dome. The park, in central California"s Sierra Nevada range, has been a popular destination for artists, mountaineers, settlers, and nature lovers since the mid-1800s. To protect it from logging and overgrazing by cattle, Congress designated Yosemite a national park on this day in 1890. It"s one of the most visited parks in the US, with more than 3 million visitors a year.Desktop Version
Walruses in Svalbard, Norway
Walruses in Svalbard, Norway
What"s the perfect thing to do under the midnight sun? If you"re a walrus, the answer might be taking a quick dip with your crew, chowing down on clams and mussels, and then sunbathing on a beach or ice floe. Welcome to Svalbard, an archipelago in the Arctic Ocean halfway between Norway and the North Pole. Our homepage stars were photographed in the waters off Spitsbergen, the largest of the archipelago"s nine islands, where male and female herds are found year-round. Male walruses can reach almost 12 feet long and weigh more than 2,600 pounds. During mating season, they use this girth to fight among themselves for dominance over groups of females, called harems.Desktop Version
West Cornwall Covered Bridge, Connecticut
West Cornwall Covered Bridge, Connecticut
Covered bridges like West Cornwall Covered Bridge, pictured in today"s image, were designed with roofs and siding to protect their wooden structures from weathering, greatly increasing their durability. While many were built in the 19th century, few have survived to the present day, and the ones that have are often preserved for their historical and visual significance.Desktop Version
National Public Lands Day
National Public Lands Day
National Public Lands Day takes place every fourth Saturday of September. Today is all about preserving public lands, which can be anything from national parks to urban green spaces. On this day, entry fees to many federal lands are waived, and those who participate in conservation activities like cleanups or restoring historic structures receive free entry coupons for future visits to these locations. This day has grown substantially since it began in 1994. Its first celebration was started by three national agencies and drew 700 volunteers. By 2010, the number of volunteers had increased to 170,000, spreading across more than 2,000 sites.Desktop Version
Basilica of Santa Maria della Salute, Venice, Italy
Basilica of Santa Maria della Salute, Venice, Italy
The Santa Maria della Salute church in Venice is steeped in history. As a plague devastated the city in 1630, its leader, Doge Nicolò Contarini, vowed to build a majestic church dedicated to the Virgin Mary if the city was spared. In 1631 the epidemic ended, and construction began. The church, built in the Baroque style, was completed around 50 years later, a lifelong project for architect Baldassare Longhena.Desktop Version
Blue-throated toucanet, Los Quetzales National Park, Costa Rica
Blue-throated toucanet, Los Quetzales National Park, Costa Rica
Tucked away in the highlands of Costa Rica, Los Quetzales National Park offers a kaleidoscope of lush habitats, including one that"s home to the blue-throated toucanet. These non-migratory birds use their dexterous toes to navigate branches, while their distinctive bills deftly forage for fruits, insects, and small lizards.Desktop Version