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Mercury in retrograde
Mercury in retrograde
Today we"re traveling to outer space to catch a glimpse of the Caloris Basin on the planet Mercury. This small planet—about the size of Earth"s moon—is riddled with craters, but none as spectacular as the Caloris Basin. One of the largest impact craters in the solar system, Caloris is about 950 miles across and ringed by mile-high mountains.Desktop Version
Let’s go foraging
Let’s go foraging
It’s peak season for many kinds of mushroom, but to find this unique species you’ll have to travel someplace tropical. This cup fungus, cookeina, was photographed growing on the rainforest floor in Costa Rica. Like other fungi, it serves as a decomposer, helping to break down dead plants and animals in the ecosystem. Their unique cup shape aids in spore dispersal; it helps raindrops to splash spores out into the forest where the fungi can spread.Desktop Version
Sky island views
Sky island views
Though it"s December, it isn"t cold and snowy everywhere in North America. Here, near Tucson, Arizona, the Sonoran Desert stays warm year-round. In this photo, we"re looking at a "sky island"—an isolated, high-elevation woodland surrounded by radically different lowland environments. In this case, the desert land at the base of the mountain is peppered with saguaros—a stately cactus recognized for its long arms. The snow-capped Santa Catalina Mountains in the distance are part of the Madrean Sky Islands and are home to Mount Lemmon Ski Valley, which is the southernmost ski destination in the US. The ski area covers the slopes of Mount Lemmon, which reaches an elevation of about 9,100 feet at the summit and can receive around 180 inches of snow annually.Desktop Version
Summer’s in home stretch
Summer’s in home stretch
When people talk about the ‘dog days of summer,’ they’re referring to the sultry, hot days of the season that sometimes seem to stretch on forever–just like those long legs on the star of today’s homepage. This is a maned wolf, also known as a ‘fox on stilts,’ and it’s the largest species of canid in South America. As a canid, it belongs to the same family as the domestic dog, wolf, and coyote, and we think it makes a fun spokescritter for summer’s ‘dog days.’Desktop Version
Lick Observatory
Lick Observatory
Shrouded in snow on the summit of Mount Hamilton, in the Diablo Range just east of San Jose, California, lies the world"s first permanently occupied mountaintop observatory. Constructed between 1876 and 1887, the Lick Observatory has been the site of significant discoveries, including several of Jupiter"s moons and other planetary systems. It"s named for American real-estate entrepreneur James Lick, who set aside $700,000 for the University of California to build a facility that would be home to a "telescope superior to and more powerful than any telescope yet made."Desktop Version
Social climbing
Social climbing
March 2019 saw the opening of a structure called "Vessel" that overlooks the Hudson River in New York. "Vessel" is a 16-story, honeycomb-looking staircase that’s meant to be climbed. Its 154 flights of stairs are interconnected, much like Indian stepwells, which lent inspiration to designer Thomas Heatherwick. Not to worry. For those who would rather skip the 2,500 steps, they can reach the top via elevator.Desktop Version
Aloe in bloom
Aloe in bloom
The bright flowers of these aloe plants offer a striking contrast to their more recognizable green, spiky stems. Native to Africa, Madagascar, and the Arabian Peninsula, aloes—including the well-known aloe vera species—are now grown outdoors in many locations that boast mild winter climates. They can bloom at any time throughout the year. And yes, even indoor potted aloes can be encouraged to bloom with the right amount of sunlight, water, and fertilizer.Desktop Version
Longer days mean warmer sand
Longer days mean warmer sand
Today we’re hitting the beach in Costa Rica’s Cahuita National Park because, well, just take a look at this place. If the sun gets too intense, we might take a stroll into the park’s lowland wet forest where, if we’re lucky, we’ll see sloths, toucans, and howler and capuchin monkeys; or maybe we’ll encounter armadillos, coatis, iguanas, and tamanduas (anteaters). After that, we’ll take a dip in the Caribbean waters offshore to marvel at coral reefs, sea turtles, and hundreds of species of fish.Desktop Version
The birthplace of Cinco de Mayo
The birthplace of Cinco de Mayo
The church we see on the grassy hill was built after Hernan Cortez and his Spanish army conquered Cholula one October day in 1519. The Spanish ravaged the Aztec holy city that day, murdering 10% of its population and burning down the many pyramids that dotted the area. But just underneath this church, buried for centuries, lay an ancient secret never discovered by the Spanish. It"s the largest pyramid in the world, the Great Pyramid of Cholula, so large its enormous base would span several Olympic-sized swimming pools.Desktop Version
Yabba-Dabba-Doo!
Yabba-Dabba-Doo!
This rock-solid house in the Fafe mountains of northwest Portugal looks like it could be the home of a modern Stone Age family. Known locally as Casa do Penedo (House of the Rock), its prehistoric appearance has drawn comparisons to the Flintstones" dwelling in the fictional town of Bedrock. But the secluded stone structure on our homepage is very much real—it was built as a rural retreat in the Portuguese countryside in the 1970s. The building is sandwiched between four boulders that serve as the foundation, walls, and ceiling of the house, blending in as part of the beautiful natural landscape.Desktop Version
Lighting it up for Vivid Sydney
Lighting it up for Vivid Sydney
It’s winter in Australia, and the residents of Sydney fend off the winter gloom with a citywide festival. The wild light shows of Vivid Sydney encourage people to explore the city and see it in a new light. (Sorry. That had to happen.) Our photo shows the interior of "PJ the Port Jackson Shark," a light sculpture at the Taronga Zoo. It allows visitors to walk into the mouth of the ‘shark.’Desktop Version
Dog days of summer
Dog days of summer
The weather is warmer, and the days are longer, which can only mean one thing—the dog days of summer have arrived. These Cape foxes are helping us celebrate the dog days with their frolicking in the Kalahari Desert. They may not be the kind of "dogs" you typically think of, but Cape foxes are from the same family (Canidae) as the pooches you know and love. Partly to escape the heat in the desert scrubland it prefers, the Cape fox is most active just before dawn or after dusk, commonly spotted during the early mornings and early evenings.Desktop Version
Saskatchewan s spookier side
Saskatchewan s spookier side
If you"re greeted by a friendly face and a warm "Welcome to Bents" as you stroll up to this old general store, you might be having a paranormal experience: It"s been 50 years since a living soul dwelt in this Saskatchewan ghost town.Desktop Version
Happy Independence Day!
Happy Independence Day!
Across the United States on July 4, we celebrate the adoption on this day in 1776 of the Declaration of Independence, one of the best break-up letters ever written. In this pronouncement, the Second Continental Congress put Great Britain on notice that the 13 American Colonies were no longer subject to its rules or rulers and were forming a new country, the United States of America. Declaration signers, recognizing the importance of the moment and the message, anticipated that generations later, we would remember and celebrate "from one end of this continent to the other." The celebration we"re looking at here is at the National Mall in Washington, DC, with fireworks rising above the Lincoln Memorial and Washington Monument, and reflected on the Potomac River.Desktop Version
China s colorful terraced pools
China s colorful terraced pools
While the sight of these gorgeous pools may make you want to don a swimsuit and plunge in for a refreshing soak, we don"t recommend it. The water may be fed by underground geothermal springs, but these are no hot springs—the water"s only about 41 F. We"ll take it all in from dry land. The terraced, travertine pools cascade downward for nearly 2 miles. Formed over thousands of years, calcite deposits give the water its unique, and welcoming, turquoise coloration.Desktop Version
Lakeside serenity in Finland
Lakeside serenity in Finland
Hikers and campers in Finland, where today"s photo was taken, are allowed on nearly 90 percent of the nation"s wilderness, regardless of the property"s ownership. This practice is called Everyman"s Right, or "freedom to roam." It"s not really written down in Finland"s laws, but is used as a sort of social pact: Those who want to enjoy the outdoors can roam just about anywhere, as long as they obey a few basic good-behavior rules. It"s a practice that"s observed to varying degrees across many parts of central Europe, Scandinavia, the Baltic region, and Scotland.Desktop Version
It s National Mushroom Month!
It s National Mushroom Month!
Is it just us or does this porcini mushroom look straight out of a fairy tale? We"re featuring this sweet "shroom today because September is National Mushroom Month, a non-official holiday inaugurated in 1992 as part of a governmental effort to promote mushroom farming in the US. Some of the biggest celebrations this month occur in Kennett Square, Pennsylvania, which is recognized as the Mushroom Capital of the World. The town of just 6,000 people cultivates around 500 million pounds of mushrooms each year, about half of the total US crop.Desktop Version
Paper lanterns on the longest night
Paper lanterns on the longest night
For the winter solstice today, we’re in Santa Fe, where residents celebrate the holidays with lovely paper lanterns known as farolitos, or luminarias. The annual Farolito Walk takes place each Christmas Eve in the city’s Canyon Road arts district, but the farolitos are often on display much earlier, lighting the way among the pueblo-style architecture that this region is known for. Winter solstice marks both the official start of winter, and the longest night of the year—meaning these paper lanterns will be put to good use tonight.Desktop Version
A species worth defending
A species worth defending
Some folks are quick to dismiss bats as simply ‘scary’ (and the association with Halloween doesn’t help things). But during Bat Appreciation Month, consider their valuable contributions to the ecosystem. Bats around the world help to control bug populations (including agricultural pests), pollinate important plants, and disperse seeds–helping to regenerate lands that have been overharvested or otherwise damaged. In fact, what’s truly scary is how much we’d miss bats if they were gone. In North America, a disease called white-nose syndrome has killed millions of bats since it was identified in 2006–and scientists are working hard to find a way to help bats recover. One easy way to help bats is to build or buy a bat box for your property, and provide them with a safe space to roost.Desktop Version
The call of the wild in Alaska
The call of the wild in Alaska
Most visitors to Denali National Park and Preserve in Alaska come with a checklist for the "big five" mammals that live here: grizzly bears, moose, wolves, Dall sheep, and caribou like this small group walking along a ridge. These are barren-ground caribou, a migratory subspecies of caribou found across the Arctic band of North America to western Greenland. Barren-ground caribou migrate in large herds, some traveling over 600 miles one way between their summer and winter ranges. But the Denali herd, which numbers around 1,700 animals today, generally stays on the park"s 6 million acres. For good reason, too—it"s the only large herd that isn"t hunted.Desktop Version
The long and wiggling path
The long and wiggling path
In 1926, Walter Ruesch, the first superintendent of Zion National Park in Utah, oversaw the construction of this section of the Angels Landing Trail, one of the park"s most ambitious trails. Although he had no previous engineering experience, Ruesch planned the steep 21-switchback path out of Refrigerator Canyon up to Angels Landing. The section of the trail, now affectionately called Walter’s Wiggles, was first built to enable horses" access to Cabin Spring. One of the most difficult and dangerous sections of the Angels Landing Trail, Walter"s Wiggles was resurfaced in 1985 in a project that required 258 helicopter flights to haul in concrete for the job.Desktop Version
Dyavolski Most
Dyavolski Most
You"ve heard of a bridge over troubled waters, but what if the bridge is troubled too? Legend tells of a Bulgarian stonemason, Dimitar, who was tasked with solving a bridge problem here in the early 1500s. Dimitar was hired to construct a crossing that wouldn"t collapse into the rushing Arda River, as had all previous spans in this strange spot.Desktop Version
Don t go chasing waterfalls
Don t go chasing waterfalls
The stunning limestone travertine steps of Beaver Falls are the last in a series of five waterfalls along Havasu Creek, near the bottom of the Grand Canyon. The water gets its turquoise color from calcium carbonate, which reflects the beautiful hue and creates an ever-changing tableau; the minerals are deposited, moved, and redeposited to create new formations.Desktop Version
Penguin Awareness Day
Penguin Awareness Day
We"re celebrating Penguin Awareness Day in the Falkland Islands, taking a stroll with some king penguins. Kings are the second-largest penguin species, only outranked in stature by their emperor penguin cousins. And while the kings" tuxedo coloring gives them a dash of the debonair, it also provides an important and more practical purpose: camouflage. When the birds dive deep into the ocean looking for food, their black feathers disguise the birds from predators above, while their white undersides do the reverse. Kings are legendary for their diving prowess—in their quest for tasty squid and lanternfish, they can dive to depths of 300 feet, and some have even been spotted nearly 1,000 feet beneath the surface. Underwater, these flightless birds are the epitome of grace. On land, however, they are not so graceful, and waddle or "toboggan" on their bellies to get around.Desktop Version
Happy Astronomy Day!
Happy Astronomy Day!
No, that"s not a downpour of lightsabers—but it"s no typical night sky either. Stargazing here at Paranal Observatory, on a mountaintop in Chile"s desolate Atacama Desert, you"ll get one of the clearest possible naked-eye views of the southern skies. This "lightsaber" effect comes from the photo"s long exposure: What we"re seeing is these stars" paths as they track across the night sky due to our planet"s rotation. The dazzling colors indicate temperature, from chilly red (5,000-ish degrees Fahrenheit) to balmy blue (temps in the tens of thousands).Desktop Version