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Pi Before Pi

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Although our ancestors had managed to invent the wheel millennia prior to the good ol’ days of Ancient Egypt, it wasn't until that civilization arose thousands of years later that the human race began to understand the mysteries behind the circle. Our modern comprehension of pi, or the ratio of a circle’s circumference to its diameter, is a fairly recent development in our history, and the Egyptians were the first on the ball.

The Rhind Mathematical Papyrus (above), excavated in the area surrounding the Memorial Temple of Pharaoh Rameses II in Egypt, constitutes the finest example of ancient Egyptian mathematics, as well as their claim to having discovered pi. Its author, Ahmose, titled the work “Directions for Attaining Knowledge of All Dark Things,” but its contents were much less sinister than its name suggested. Of the 87 problems into which the content of the papyrus was divided, the 48th and 50th were those which suggested genuine insight into things previously unknown. 

Problem 48 of the RMP showed a circle inscribed within a square, with hieroglyphic markings denoting its value as 64; problem 50 followed up on this information with a procedure to find “the area of a round field with a diameter of 9 khet.” The steps given call for subtracting 1/9th of the circle’s diameter, leaving 8, then multiplying it by 8, for an area of 64. After some substitution using our contemporary knowledge of the circle area formula as π * r2, the Egyptians seem to have calculated the constant value of pi as 256/81, or 3.16—not bad for a first attempt in 2000 BC.

As human civilization, and consequently the field of mathematics, advanced, great minds of every age tackled the question of pi. In 250 BC, Archimedes calculated the areas of a polygon inscribed within a circle and the polygon in which that same circle was inscribed, knowing that pi must lie between the two, and determined its exact value must be between 3 1/7 and 3 10/71. Chinese astronomer Zu Chongzhi, independently of Archimedes’s findings and approximately 700 years later, carried out a series of painstaking calculations on 24,576-sided polygon to approximate pi as 355/113.

In the early days of computer technology, new machines were put to the test by calculating pi: the amount of its digits that the computer could process served as an easy benchmark for its overall computing power. As technology has improved exponentially in the past few decades, so too has our knowledge of pi: as of September 2010, we know 2,000,000,000,000,000 digits of pi—that’s two quadrillion digits. According to Nicholas Sze, the Yahoo! engineer who used 1000 of the company’s computers and its Hadoop cloud computing app to calculate pi over a period of 23 days, that final (for now) digit is 0.

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13 Fantastic Museums You Can Visit for Free on Saturday
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On Saturday, September 23, museums and cultural institutions across the United States will open their doors to the public for free, as part of Smithsonian magazine’s annual Museum Day Live! event. Hundreds of museums are set to participate, ranging from world-famous institutions in major cities to tiny, local museums in small towns. While the full list of museums can be viewed, and tickets can be reserved, on the Smithsonian website, we’ve collected a small selection of the fantastic museums you can visit for free this Saturday.

1. NEWSEUM // WASHINGTON, D.C.

The Newseum in Washington, D.C. is an entire museum dedicated to the First Amendment. Celebrating freedom of religion, speech, press, assembly and petition, the museum features exhibits on civil rights, the Berlin Wall, and the history of news media in America. Their latest special exhibitions take a look back at the event of September 11, 2001 and go inside the FBI's crime-fighting tactics.

2. INTREPID SEA, AIR & SPACE MUSEUM // NEW YORK CITY, NEW YORK

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New York's Intrepid Sea, Air & Space Museum doesn’t just showcase America’s military and maritime history—it is a piece of that history. The museum itself is one of the Essex-class aircraft carriers built by the United States Navy during World War II. Visitors can explore its massive deck and interior, and view historic airplanes, a real World War II submarine, and a range of interactive exhibits. Normally, a ticket will set you back a whopping $33 (or $19 for New York City residents), but on Saturday, general admission is free with a Museum Day Live! ticket.

3. AUTRY MUSEUM OF THE AMERICAN WEST // LOS ANGELES, CALIFORNIA

Perfect for art lovers, history buffs, and cinephiles alike, the Autry Museum of the American West (named for legendary singing cowboy Gene Autry) offers up an eclectic mix of art, historical artifacts from the real American West, and Western film memorabilia and props.

4. MUSEUM OF ARTS AND SCIENCES // DAYTONA BEACH, FLORIDA

A massive art, science, and history museum located on a 90-acre nature preserve, the Museum of Arts and Sciences features the largest collection of Florida art anywhere in the world, as well as the largest collection of Coca-Cola memorabilia in all of Florida. Its diverse exhibits are alternately awe-inspiring, informative, and quirky, ranging from an exploration of 2000 years of sculpture art to an exhibition of 19th and 20th century advertising posters.

5. INTERNATIONAL MUSEUM OF THE HORSE AT THE KENTUCKY HORSE PARK // LEXINGTON, KENTUCKY

The International Museum of the Horse explores the history of—you guessed it!—the horse. That might sound like a narrow scope, but the museum doesn’t just display horse racing artifacts or teach you about modern horse breeds. Instead, it endeavors to tackle the 50-million-year evolution of the horse and its relationship with humans from ancient times to modern times.

6. THE PEGGY NOTEBAERT NATURE MUSEUM // CHICAGO, ILLINOIS

Pete LaMotte, Flickr // CC BY-NC-ND 2.0

The 160-year-old Peggy Notebaert Nature Museum is pulling out all the stops for this year’s Museum Day Live! In addition to their vast exhibits of animal specimens and cultural artifacts, the museum will be hosting a live animal feeding and a butterfly release throughout the day.

7. OGDEN MUSEUM OF SOUTHERN ART // NEW ORLEANS, LOUISIANA

The Ogden Museum of Southern Art aims to teach visitors about the rich culture and diverse visual arts of the American South. Right now, visitors can view a collection of William Eggleston's photographs and check out the museum's 10th annual invitational exhibition of ceramic teacups and teapots.

8. BALTIMORE MUSEUM OF INDUSTRY // BALTIMORE, MARYLAND

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Located in a 19th century oyster cannery on the Baltimore waterfront, the Baltimore Museum of Industry tells the story of American manufacturing from garment making to video game design. Visitors this weekend can meet video game designers and create custom games at the museum’s interactive “Video Game Wizards” exhibit.

9. SYLVAN HEIGHTS BIRD PARK // SCOTLAND NECK, NORTH CAROLINA

You can meet 2000 birds from around the world this weekend at the 18-acre Sylvan Heights Bird Park. Visitors to the massive garden can walk through aviaries displaying birds from every continent except Antarctica, including ducks, geese, swans, and exotic birds from all over the world.

10. DELTA BLUES MUSEUM // CLARKSDALE, MISSISSIPPI

Visit Mississippi, Flickr // CC BY-ND 2.0

Visitors to the Delta Blues Museum can learn about the unique American musical art form in “the land where blues began,” with audiovisual exhibits centered on blues and rock legend Don Nix, as well as Paramount Records illustrator Anthony Mostrom.

11. NATIONAL MUSEUM OF NUCLEAR SCIENCE & HISTORY // ALBUQUERQUE, NEW MEXICO

America’s only congressionally chartered museum dedicated to the story of the Atomic Age, the National Museum of Nuclear Science & History features exhibits on everything from nuclear medicine to representations of atomic power in pop culture. Adult visitors to the museum will delight in its impressively nuanced take on nuclear technology, while kids will love the museum’s outdoor airplane exhibit and hands-on science activities at Little Albert’s Lab.

12. MUSEUM OF THE MOUNTAIN MAN // PINEDALE, WYOMING

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Dedicated to the mountain men who explored and settled Wyoming in the 19th century, the Museum of the Mountain Man brings American folklore and legends to life. The museum features exhibits on the Rocky Mountain fur trade and tells the story of American folk legend and famed mountain man Hugh Glass (the man Leonardo DiCaprio won an Oscar playing in 2015's The Revenant).

13. BESH BA GOWAH ARCHAEOLOGICAL PARK AND MUSEUM // GLOBE, ARIZONA

Arizona’s Besh Ba Gowah Archaeological Park and Museum lets visitors connect with history firsthand. The museum is home to the ruins and artifacts of the Salado Indians who inhabited Arizona from the 13th century through the 15th century, and even lets visitors wander through an 800-year-old Salado pueblo.

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‘American Gothic’ Became Famous Because Many People Saw It as a Joke
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In 1930, Iowan artist Grant Wood painted a simple portrait of a farmer and his wife (really his dentist and sister) standing solemnly in front of an all-American farmhouse. American Gothic has since inspired endless parodies and is regarded as one of the country’s most iconic works of art. But when it first came out, few people would have guessed it would become the classic it is today. Vox explains the painting’s unexpected path to fame in the latest installment of the new video series Overrated.

According to host Phil Edwards, American Gothic made a muted splash when it first hit the art scene. The work was awarded a third-place bronze medal in a contest at the Chicago Art Institute. When Wood sold the painting to the museum later on, he received just $300 for it. But the piece’s momentum didn’t stop there. It turned out that American Gothic’s debut at a time when urban and rural ideals were clashing helped it become the defining image of the era. The painting had something for everyone: Metropolitans like Gertrude Stein saw it as a satire of simple farm life in Middle America. Actual farmers and their families, on the other hand, welcomed it as celebration of their lifestyle and work ethic at a time when the Great Depression made it hard to take pride in anything.

Wood didn’t do much to clear up the work’s true meaning. He stated, "There is satire in it, but only as there is satire in any realistic statement. These are types of people I have known all my life. I tried to characterize them truthfully—to make them more like themselves than they were in actual life."

Rather than suffering from its ambiguity, American Gothic has been immortalized by it. The country has changed a lot in the past century, but the painting’s dual roles as a straight masterpiece and a format for skewering American culture still endure today.

Get the full story from Vox below.

[h/t Vox]

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