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Wikimedia Commons

This is Not a Prank: 10 Events That Actually Happened on April 1

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Wikimedia Commons

Happy April Fool’s Day! And while today is a good day to be skeptical of any unusual news you hear, do keep in mind that, sometimes, the truth is stranger than pranks. For instance, imagine it’s 1948, and you just heard that…

1. The universe was created by some sort of bang.

That was the conclusion of a groundbreaking paper published in the April 1st, 1948 issue of scientific journal Physical Review. The paper—drably titled “The Origin of Chemical Elements”—didn’t actually use any terminology as zesty as “big bang” to describe its theory, but the idea was there. As for the term “Big Bang,” that came two years later from cosmologist Fred Hoyle…one of the theory’s most vocal critics.

2. Meanwhile, across the universe…

April 1st, 1970: The final Beatles recording session takes place at Abbey Road. However, the session only features one Beatle—Ringo—who was kind enough to provide some percussion for “The Long and Winding Road.” Ringo’s contributions took place alongside roughly 50 other instruments in a session being produced by Phil Spector. Paul McCartney hated the results so much, he officially broke up the band 10 days later.

3. “Uh, General Pickett? Your troops are getting slaughtered…”

April 1st, 1865: The Confederacy suffers nearly 3000 casualties in a decisive Union victory in the Battle of Five Forks. It’s often called the “Waterloo of the Confederacy,” but it might not have been so bad if Major General George Pickett hadn’t been enjoying a leisurely luncheon with two other southern generals, oblivious to the Confederate carnage taking place two miles away.

4. Announcing: A computer in a wooden box with 4K of memory...

…all for the catchy price of $666.66. If this sounds like a sketchy investment, keep in mind the machine was being made by Apple—founded on April 1st, 1976.   

5. Ohio man decides to go for a walk … around the world.

April 1, 1983: Steve Newman leaves his house in the town of Bethel for a 4-year journey that saw him getting mugged, pelted with stones, arrested multiple times, and attacked by boar and bison. Upon his return to Bethel on April 1, 1987, he became the first person to walk around the world solo. Unfortunately, Steve’s trek probably caused him to miss an unprecedented event in sports history…

6. A number 8 seed wins it all.

April 1, 1985: Villanova—a school that finished fourth in its own conference—defeats Patrick Ewing and the mighty Georgetown Hoyas to win the NCAA Basketball Tournament in the most famous upset in college hoops history. Villanova’s bracket-busting feat has yet to be replicated, and an eighth-seeded team has only reached the Finals once since. It was also the last college game to be played without a shot clock.

7. Same sex marriage is legalized.

April 1st, 2001: The Netherlands became the first country in the world to legalize same sex marriage. The Netherlands also became the first country in the world where…

8. Euthanasia is legalized...

…on April 1st, 2002.  

9. “Neither rain, nor d’oh...”

April 1st, 2009: The USPS announced it was commemorating the 20th anniversary of The Simpsons with a 1-billion stamp run.  Alas, the stamps proved to be as popular as the Fat Elvis. Less than one third are sold, resulting in a $1.2 million loss for the USPS.  

10. Happy Cheap Trick Day!

Through the efforts of state senator Dave Syverson, April 1 is now Cheap Trick Day in Illinois, in honor of the Rockford rock legends.  Even better: The 2008 resolution was signed by a guy who knew a thing or two about cheap tricks himself … disgraced governor Rod Blagojevich.

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iStock // Ekaterina Minaeva
technology
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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Stephen Missal
crime
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New Evidence Emerges in Norway’s Most Famous Unsolved Murder Case
May 22, 2017
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A 2016 sketch by a forensic artist of the Isdal Woman
Stephen Missal

For almost 50 years, Norwegian investigators have been baffled by the case of the “Isdal Woman,” whose burned corpse was found in a valley outside the city of Bergen in 1970. Most of her face and hair had been burned off and the labels in her clothes had been removed. The police investigation eventually led to a pair of suitcases stuffed with wigs and the discovery that the woman had stayed at numerous hotels around Norway under different aliases. Still, the police eventually ruled it a suicide.

Almost five decades later, the Norwegian public broadcaster NRK has launched a new investigation into the case, working with police to help track down her identity. And it is already yielding results. The BBC reports that forensic analysis of the woman’s teeth show that she was from a region along the French-German border.

In 1970, hikers discovered the Isdal Woman’s body, burned and lying on a remote slope surrounded by an umbrella, melted plastic bottles, what may have been a passport cover, and more. Her clothes and possessions were scraped clean of any kind of identifying marks or labels. Later, the police found that she left two suitcases at the Bergen train station, containing sunglasses with her fingerprints on the lenses, a hairbrush, a prescription bottle of eczema cream, several wigs, and glasses with clear lenses. Again, all labels and other identifying marks had been removed, even from the prescription cream. A notepad found inside was filled with handwritten letters that looked like a code. A shopping bag led police to a shoe store, where, finally, an employee remembered selling rubber boots just like the ones found on the woman’s body.

Eventually, the police discovered that she had stayed in different hotels all over the country under different names, which would have required passports under several different aliases. This strongly suggests that she was a spy. Though she was both burned alive and had a stomach full of undigested sleeping pills, the police eventually ruled the death a suicide, unable to track down any evidence that they could tie to her murder.

But some of the forensic data that can help solve her case still exists. The Isdal Woman’s jaw was preserved in a forensic archive, allowing researchers from the University of Canberra in Australia to use isotopic analysis to figure out where she came from, based on the chemical traces left on her teeth while she was growing up. It’s the first time this technique has been used in a Norwegian criminal investigation.

The isotopic analysis was so effective that the researchers can tell that she probably grew up in eastern or central Europe, then moved west toward France during her adolescence, possibly just before or during World War II. Previous studies of her handwriting have indicated that she learned to write in France or in another French-speaking country.

Narrowing down the woman’s origins to such a specific region could help find someone who knew her, or reports of missing women who matched her description. The case is still a long way from solved, but the search is now much narrower than it had been in the mystery's long history.

[h/t BBC]

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