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Drexel University, Youtube

Humongous New Dinosaur Discovered in Patagonia

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Drexel University, Youtube

Ladies and gentlemen, meet Dreadnoughtus schrani, a newfound giant which—thanks to an amazing skeleton—can help us better understand some of the biggest dinosaurs that ever lived.

The species’ discovery was recently announced by an international fossil-hunting team, which excavated two specimens—including one that was unusually complete. A resident of modern-day Patagonia, this animal was roughly 86 feet in length and weighed an estimated 65 tons. At that size, Dreadnoughtus likely had few natural enemies when fully grown. Appropriately, therefore, its genus name literally means “fears nothing.”

Remember the Titanosaurs

Extra-large dinosaurs are nothing new in South America. Earlier this year, an eight-foot upper arm bone belonging to some huge herbivore was spotted in the vicinity of La Flecha, Argentina. Also, nearly man-sized backbones from a colossal creature called Argentinosaurus have been popping up since the 1980s.

Argentinosaurus and Dreadnoughtus are both classified as “titanosaurs”: a group of long-necked plant-eaters which started evolving during the early Cretaceous period around 100 million years ago. “Titanosaurs are… [remarkable] dinosaurs,” says Carnegie Museum of Natural History paleontologist Matthew Lamanna, “with species ranging from the weight of a cow to the weight of a sperm whale or more.”

Yet, larger titanosaur varieties usually haven’t been well-represented in the fossil record. Instead, amazing dinos like Argentinosaurus are largely known from scrappy material and isolated fragments.

But what makes the recent Dreadnoughtus discovery so exciting is the fact that nearly half (43%) of one skeleton has been recovered. For experts, this presents some exciting research possibilities.

Going Out on a Limb

Weighing a dinosaur is no simple task. Reimagining muscle mass is particularly tricky: when you’ve only got some skeletal remains to work with, it’s sometimes difficult to assess how slender or bulky their owner was.

However, limb anatomy can help point us in the right direction, especially when dealing with four-legged creatures like Dreadnoughtus. This new skeleton includes a humerus (“funny bone”) and femur (“thigh bone”), allowing paleontologists to take critical measurements designed to help ascertain how much heft these bones supported in everyday life. Therefore, Dreadnoughtus’ weight is, theoretically, far more calculable than that of most plus-sized titanosaurs.

So, Was this the Biggest. Dinosaur. Ever?

It’s far too early to say. Ultimately, we may never know for sure. As mentioned earlier, dinosaurian behemoths don’t tend to fossilize very completely. Ergo, adequate length and mass measurements are often impossible.

Consider, for example, a mysterious species called Amphicoelias altus. To date, this beast’s existence is evidenced by a single vertebrae, which went missing after its discovery and remains unaccounted for. By comparing the fossil’s size to that of a corresponding bone in its smaller relative Diplodocus, some researchers have claimed that Amphicoelias could’ve been over 190 feet long! However, in the absence of any complete Amphicoelias skeletons, we can neither confirm nor deny these speculations or start comparing it with other jumbo dinos.

Nevertheless, one thing is quite certain: in their heyday, Dreadnoughtus and its kin must’ve been a spectacular sight to see.

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iStock // Ekaterina Minaeva
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
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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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Here's How to Change Your Name on Facebook
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Whether you want to change your legal name, adopt a new nickname, or simply reinvent your online persona, it's helpful to know the process of resetting your name on Facebook. The social media site isn't a fan of fake accounts, and as a result changing your name is a little more complicated than updating your profile picture or relationship status. Luckily, Daily Dot laid out the steps.

Start by going to the blue bar at the top of the page in desktop view and clicking the down arrow to the far right. From here, go to Settings. This should take you to the General Account Settings page. Find your name as it appears on your profile and click the Edit link to the right of it. Now, you can input your preferred first and last name, and if you’d like, your middle name.

The steps are similar in Facebook mobile. To find Settings, tap the More option in the bottom right corner. Go to Account Settings, then General, then hit your name to change it.

Whatever you type should adhere to Facebook's guidelines, which prohibit symbols, numbers, unusual capitalization, and honorifics like Mr., Ms., and Dr. Before landing on a name, make sure you’re ready to commit to it: Facebook won’t let you update it again for 60 days. If you aren’t happy with these restrictions, adding a secondary name or a name pronunciation might better suit your needs. You can do this by going to the Details About You heading under the About page of your profile.

[h/t Daily Dot]