An Astronomer Solves a 70-Year-Old Ansel Adams Mystery

Ansel Adams circa 1950
Ansel Adams circa 1950
J. Malcolm Greany, Wikimedia Commons // Public Domain

Ansel Adams was a genius with a camera, but he wasn’t so great about taking notes. The famous 20th century landscape photographer did not keep careful records of the dates he took his photos, leading to some debate over the origin period of certain images, including Denali and Wonder Lake (below), taken in Denali National Park in Alaska sometime in the late 1940s.

A black-and-white photo of Denali as seen from across Wonder Lake
Denali and Wonder Lake
Collection Center for Creative Photography, The University of Arizona, © The Ansel Adams Publishing Rights Trust

To settle a debate about when the photograph (known as Mount McKinley and Wonder Lake until the mountain's name was officially changed in 2015) was taken, Texas State University astronomer Donald Olson looked to the sky, using astronomical hints to determine the exact date, time, and location it was shot. Olson—who has solved other cultural mysteries related to topics such as Edvard Munch's paintings and Chaucer's writing using the night sky—writes about the process in his new book, Further Adventures of the Celestial Sleuth.

Adams did take some technical notes during his photography shoots, writing down the exposure time, film type, filters, and other settings used to capture the image, but he wasn’t as meticulous about the more mundane parts of the shoot, like the date. However, during his research, Olson found that another photo, Moon and Denali, was taken the night before the image in question. Because that one featured the moon, he could use it to calculate the date of both images—once he figured out where Moon and Denali was taken.

The moon hangs in the sky over Denali in a black-and-white photo
Moon and Denali
Collection Center for Creative Photography, The University of Arizona, © The Ansel Adams Publishing Rights Trust

To do so, Olson used topographical features such as cirques, hollowed landforms carved by glaciers, that were visible in Moon and Denali to identify several areas of the park where Adams may have been working. He and his student, Ava Pope, wrote a computer program to calculate the view from each possible location along the park road Adams drove along during his trip, eventually determining the coordinates of the location where the photographer shot Moon and Denali.

He could then estimate, using the position of the waxing gibbous moon in the photo, the exact time —8:28 p.m. on July 14, 1948—that Moon and Denali was taken. Denali and Wonder Lake would have been taken the next morning, and Olson was able to calculate from the shadows along the mountain where the sun would have been in the sky, and thus, when the photo was taken.

The answer? Exactly 3:42 a.m. Central Alaska Standard Time on July 15, 1948.

This Wall Chart Shows Almost 130 Species of Shark—All Drawn to Scale

Pop Chart Lab
Pop Chart Lab

Shark Week may be over, but who says you can’t celebrate sharp-toothed predators year-round? Pop Chart Lab has released a new wall print featuring nearly 130 species of selachimorpha, a taxonomic superorder of fish that includes all sharks.

The shark chart
Pop Chart Lab

Called “The Spectacular Survey of Sharks,” the chart lists each shark by its family classification, order, and superorder. An evolutionary timeline is also included in the top corner to provide some context for how many millions of years old some of these creatures are. The sharks are drawn to scale, from the large but friendly whale shark down to the little ninja lanternsharka species that lives in the deep ocean, glows in the dark, and wasn’t discovered until 2015.

You’ll find the popular great white, of course, as well as rare and elusive species like the megamouth, which has been spotted fewer than 100 times. This is just a sampling, though. According to World Atlas, there are more than 440 known species of shark—plus some that probably haven't been discovered yet.

The wall chart, priced at $29 for an 18” x 24” print, can be pre-ordered on Pop Chart Lab’s website. Shipping begins on August 27.

8 Things You Might Not Know About the Louvre

Pascal Le Segretain/Getty Images
Pascal Le Segretain/Getty Images

It might be the most iconic art museum in the world. Located in Paris, the Louvre (officially the Musée du Louvre) has admitted thousands of cultural artifacts and millions of admirers since opening its doors on this day in 1793. A guided tour is always best, but if you can’t make it to the Right Bank of the Seine, check out these eight facts about the 225-year-old landmark’s past, present, and future.

1. IT WAS CONCEIVED AS A CASTLE FORTRESS.

Before French King Philip II left for the Crusades in 1190, he ordered the fortification of the Seine area along the western border of Paris against any antagonists. Crowning the structure was a castle that featured a moat and defensive towers; it also housed a prison for undesirables. Over time, other construction urbanized the area, reducing the need for a combat-ready tower. In the 1500s, King Francis I built his residence on the same site. An art lover, Francis’s home and its collection of pieces hinted at what the Louvre would eventually become. In 1793, part of the Louvre became a public museum.

2. IT BECAME AN ARTIST RETREAT.

Before art was on open display for public consumption, the Louvre invited artists to stay and work on site and treat the building like a creative retreat. In 1608, Henri IV began offering artists both studio and living space in the Louvre. They could sculpt, paint, and generally do as they wished—but by the 18th century, the surplus of distinguished squatters had left the property a bit of a mess, and their residency was eventually phased out.

3. NAPOLEON RENAMED IT AFTER HIMSELF.

Crowned emperor in 1804, Napoleon Bonaparte wasn’t above a little self-glorification. Having spearheaded the transformation of the Louvre from a cultural hub to his own tributary, he had the name changed to the Musée Napoléon and hung the Mona Lisa in his bedroom. The banner lasted until his defeat in 1815.

4. AN ARTIST MADE ITS FAMED PYRAMID VANISH.

In a move right out of David Copperfield’s playbook, in 2016 French artist JR was able to execute an impressive optical illusion using the three-story glass pyramid that sits outside the front of the Louvre. The surface was pasted with black-and-white photographs of surrounding buildings, making it seem like the construct had disappeared entirely. The performance piece was left up for about a month.

5. THE MONA LISA WAS SWIPED FROM IT.

Art heists in movies are typically pretty glamorous affairs, with gentlemen thieves and Swiss-watch planning. But when crooks lifted the Mona Lisa from its perch in the Louvre in 1911, it was a fairly indelicate operation. Three Italian handymen hid in the museum overnight, then removed the painting from the wall and bid a retreat out the door in full view of the public. One of them tried selling it over two years later, but a suspicious dealer phoned police. The ensuing media coverage is thought to be one of the reasons the painting has become one of the most famous in the world.

6. IT ONCE CLOSED BECAUSE OF PICKPOCKETS.

In 2013, nearly half of the museum’s 450 employees refused to come to work because of a nagging pest on the premises: pickpockets. Employees said that the adolescent criminals—admission is free for those under 18—distracted and robbed American tourists and showed only disdain for Louvre workers who tried to intervene. Authorities agreed to increase security measures, and the workers returned to their posts.

7. IT HAS RESIDENT “COPYISTS.”

Few museums sanction forgeries of any type, but the Louvre recognizes the curious subculture of artists who enjoy trying to replicate famous works. Every day from 9:30 to 1:30, “copyists” are allowed to set up easels and study paintings while working on their own replicas. The appeal for the artists is to try to gain insight into the process behind masterpieces; the museum insists that the canvas size not be exactly the same, and that they’re not signed.

8. AN APP CAN HELP YOU FIND AN EXIT.

With more than 8 million visitors annually, the Louvre can often feel congested to tourists unfamiliar with its layout. In 2016, the museum began offering an app that guides users around, offering them a pre-planned tour or an exit strategy. Lost? Hang a left at the Picasso, then a right at the Michelangelo.

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