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Prof Kenneth Myers
Prof Kenneth Myers

Most of the World’s Population Lives Within This 2500-Mile Radius

Prof Kenneth Myers
Prof Kenneth Myers

The Earth gets more crowded each year. In just the past decade, the planet has welcomed about 1 billion new residents. The biggest contributors to the booming population are a handful of countries, and most of them fall within a 2500-mile radius.

As friend of Mental Floss Ken Jennings writes for Condé Nast Traveler, the Valeriepieris circle covers more than half the world’s population. China and India, the world’s two most populous nations, plus Indonesia (the fourth) and Pakistan (the sixth), are all part of a section of Earth that stretches 2500 miles in all directions from a central point near Hainan, China's southernmost area. Bangladesh, Japan, the Philippines, and Vietnam, which all place in the top 15 most populous countries, are also included.

Not only are the populations of these places high, they’re also dense. In Bangladesh’s capital of Dhaka, for instance, every square mile holds about 115,000 citizens. (For comparison, New York City, America's most densely populated city, counts roughly 27,000 per square mile.) That explains how this circle can house billions of humans while also containing a lot of open ocean and empty desert.

The Valeriepieris circle is named after the American Reddit user who first shared the map in 2013. His real name is Ken Myers, and he was inspired to create the graphic after visiting Manila in the Philippines for a teaching fellowship and seeing firsthand how many people were crammed into the tight area. The math was checked by Singapore economics professor Danny Quah years later, and he found that Myers had actually been generous with his calculations. Narrow down the circle to a 2050 mile radius, with Mong Khet in Myanmar as the center point, and it still fits close to half the world’s people.

[h/t Condé Nast Traveler]

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euphro, Flickr // CC BY-SA 2.0
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geography
Mount Jackson Loses Spot as UK's Tallest Mountain After Satellite Reveals Measurement Error
euphro, Flickr // CC BY-SA 2.0
euphro, Flickr // CC BY-SA 2.0

Geography textbook writers, take note: The British Antarctic Survey (BAS) has just made a major correction to its old data. As Independent reports, satellite imagery reveals that Mount Hope in the British Atlantic Territory is 1236 feet taller than previously believed, unseating Mount Jackson as the UK’s tallest peak.

BAS realized the old height was incorrect after surveying mountains in Britain’s Antarctic territory using satellite technology. Inaccurate measurements pose a threat to planes flying over the mountains, and with the mapping project BAS intended to make the route safer for aircraft.

Prior to the survey, Mount Jackson was thought to be the tallest mountain in the British Atlantic Territory and the greater UK at 10,446 feet, the BBC reports. But after reviewing the new elevation data, BAS found that Mount Hope bests it by just 180 feet. Reaching 10,627 feet at its summit, Mount Hope is officially Britain’s tallest mountain.

Historically, mountains were measured on the ground using basic math equations. By measuring the distance between two points at the base of a mountain and calculating the angle between the top of the mountain and each point, researchers could estimate its height. But this method leaves a lot of room for error, and today surveyors use satellites circling the globe to come up with more precise numbers.

Because they’re both located in Antarctica, neither of the two tallest mountains in the UK is a popular climbing destination. British thrill-seekers usually choose Ben Nevis, the highest mountain in the British Isles, as their bucket-list mountain of choice—but at just 4413 at its highest point, climbing it would be a breeze compared to conquering Mount Hope.

[h/t Independent]

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Courtesy of Sotheby's
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History
Found: A Rare Map of Australia, Created During the 17th Century
Courtesy of Sotheby's
Courtesy of Sotheby's

More than 40 years before Captain James Cook landed on Australia’s eastern coast in 1770, renowned Dutch cartographer Joan Blaeu created an early map of the Land Down Under. Using geographical information gleaned from Dutch navigator Abel Tasman in the 1640s, it was the first map to include the island state of Tasmania and name New Zealand, and the only one to call Australia “Nova Hollandia.”

Very few copies—if any—of the 1659 map, titled Archipelagus Orientalis (Eastern Archipelago), were thought to have survived. But in 2010, a printing was discovered in a Swedish attic. After being restored, the artifact is newly on display at the National Library of Australia, in the capital city of Canberra, according to news.com.au.

The seller’s identity has been kept under wraps, but it’s thought that the map belonged to an antiquarian bookseller who closed his or her business in the 1950s. For decades, the map sat amidst other papers and books until it was unearthed in 2010 and put up for auction.

The National Library acquired the 17th century wall map in 2013 for approximately $460,000. After a lengthy restoration process, it recently went on display in its Treasures Gallery, where it will hang until mid-2018.

As for other surviving copies of the map: a second version was discovered in a private Italian home and announced in May 2017, according to Australian Geographic. It ended up selling for more than $320,000.

[h/t news.com.au]

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