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Giant crystals explained!

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You've probably seen the pictures: Mexican miners dwarfed by enormous gypsum crystals more than thrice their size. For weeks, their size baffled scientists, but now it seems they've cracked the mystery. According to the BBC, "The scientists studied tiny pockets of fluid trapped in the crystals and conducted back-up lab experiments. They report in the journal Geology that the solution from which the crystals grew must have been kept in a very narrow, stable temperature range." This leads them to believe that there are even more -- and perhaps more spectacular -- crystal caves yet to be discovered.

An even more in-depth explanation, after the jump!

The crystals owe their origin to the volcanism which laid down the metal sulphides - the ores - that have proved so valuable. Copious amounts of calcium sulphate would also have been created towards the end of this mineralisation process more than 20 million years ago - but in the hot fluids that infused the cracks and cavities in the rock, this calcium sulphate would have taken the form of anhydrite.

Anhydrite has the same chemical formula as gypsum, except that it excludes water. Only as the magma chamber deep under the Naica mountain cooled did the hot fluids above start to fall to a temperature at which anhydrite could switch to gypsum.

Professor Garcia-Ruiz and colleagues say their studies indicate that the deeper of the two caves - Cueva de los Cristales - must have been kept just below the transition temperature for many hundreds of thousands of years. "The conditions were perfect. By maintaining the temperature just below 58 degrees for a very long time you get a few, very big crystals," said Professor Garcia-Ruiz.

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10 Surprising Facts About The Babadook
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In 2014, The Babadook came out of nowhere and scared audiences across the globe. Written and directed by Aussie Jennifer Kent, and based on her short film Monster, The Babadook is about a widow named Amelia (played by Kent’s drama schoolmate Essie Davis) who has trouble controlling her young son Samuel (Noah Wiseman), who thinks there’s a monster living in their house. Amelia reads Samuel a pop-up book, Mister Babadook, and Samuel manifests the creature into a real-life monster. The Babadook may be the villain, but the film explores the pitfalls of parenting and grief in an emotional way. 

“I never approached this as a straight horror film,” Kent told Complex. “I always was drawn to the idea of grief, and the suppression of that grief, and the question of, how would that affect a person? ... But at the core of it, it’s about the mother and child, and their relationship.”

Shot on a $2 million budget, the film grossed more than $10.3 million worldwide and gained an even wider audience via streaming networks. Instead of creating Babadook out of CGI, a team generated the images in-camera, inspired by the silent films of Georges Méliès and Lon Chaney. Here are 10 things you might not have known about The Babadook (dook, dook).

1. THE NAME “BABADOOK” WAS EASY FOR A CHILD TO INVENT.

Jennifer Kent told Complex that some people thought the creature’s name sounded “silly,” which she agreed with. “I wanted it to be like something a child could make up, like ‘jabberwocky’ or some other nonsensical name,” she explained. “I wanted to create a new myth that was just solely of this film and didn’t exist anywhere else.”

2. JENNIFER KENT WAS WORRIED PEOPLE WOULD JUDGE THE MOTHER.

Amelia isn’t the best mother in the world—but that’s the point. “I’m not a parent,” Kent told Rolling Stone, “but I’m surrounded by friends and family who are, and I see it from the outside … how parenting seems hard and never-ending.” She thought Amelia would receive “a lot of flak” for her flawed parenting, but the opposite happened. “I think it’s given a lot of women a sense of reassurance to see a real human being up there,” Kent said. “We don’t get to see characters like her that often.”

3. KENT AND ESSIE DAVIS TONED DOWN THE CONTENT FOR THE KID.

Noah Wiseman was six years old when he played Samuel. Kent and Davis made sure he wasn’t present for the more horrific scenes, like when Amelia tells Samuel she wishes he was the one who died, not her husband. “During the reverse shots, where Amelia was abusing Sam verbally, we had Essie yell at an adult stand-in on his knees,” Kent told Film Journal. “I didn’t want to destroy a childhood to make this film—that wouldn’t be fair.”

Kent explained a “kiddie version” of the plot to Wiseman. “I said, ‘Basically, Sam is trying to save his mother and it’s a film about the power of love.’”

4. THE FILM IS ALSO ABOUT “FACING OUR SHADOW SIDE.”

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Kent told Film Journal that “The Babadook is a film about a woman waking up from a long, metaphorical sleep and finding that she has the power to protect herself and her son.” She noted that everybody has darkness to face. “Beyond genre and beyond being scary, that’s the most important thing in the film—facing our shadow side.”

5. THE FILM SCARED THE HELL OUT OF THE DIRECTOR OF THE EXORCIST.

In an interview with Uproxx, William Friedkin—director of The Exorcist—said The Babadook was one of the best and scariest horror films he’d ever seen. He especially liked the emotional aspect of the film. “It’s not only the simplicity of the filmmaking and the excellence of the acting not only by the two leads, but it’s the way the film works slowly but inevitably on your emotions,” he said.

6. AN ART DEPARTMENT ASSISTANT SCORED THE ROLE AS THE BABADOOK.

Tim Purcell worked in the film’s art department but then got talked into playing the titular character after he acted as the creature for some camera tests. “They realized they could save some money, and have me just be the Babadook, and hence I became the Babadook,” Purcell told New York Magazine. “In terms of direction, it was ‘be still a lot,’” he said.

7. THE MOVIE BOMBED IN ITS NATIVE AUSTRALIA.

Even though Kent shot the film in Adelaide, Australians didn’t flock to the theaters; it grossed just $258,000 in its native country. “Australians have this [built-in] aversion to seeing Australian films,” Kent told The Cut. “They hardly ever get excited about their own stuff. We only tend to love things once everyone else confirms they’re good … Australian creatives have always had to go overseas to get recognition. I hope one day we can make a film or work of art and Australians can think it’s good regardless of what the rest of the world thinks.”

8. YOU CAN OWN A MISTER BABADOOK BOOK (BUT IT WILL COST YOU). 

IFC Films

In 2015, Insight Editions published 6200 pop-up books of Mister Babadook. Kent worked with the film’s illustrator, Alexander Juhasz, who created the book for the movie. He and paper engineer Simon Arizpe brought the pages to life for the published version. All copies sold out but you can find some Kent-signed ones on eBay, going for as much as $500.

9. THE BABADOOK IS A GAY ICON.

It started at the end of 2016, when a Tumblr user started a jokey thread about how he thought the Babadook was gay. “It started picking up steam within a few weeks,” Ian, the Tumblr user, told New York Magazine, “because individuals who I presume are heterosexual kind of freaked out over the assertion that a horror movie villain would identify as queer—which I think was the actual humor of the post, as opposed to just the outright statement that the Babadook is gay.” In June, the Babadook became a symbol for Gay Pride month. Images of the character appeared everywhere at this year's Gay Pride Parade in Los Angeles.

10. DON'T HOLD YOUR BREATH FOR A SEQUEL.

Kent, who owns the rights to The Babadook, told IGN that, despite the original film's popularity, she's not planning on making any sequels. “The reason for that is I will never allow any sequel to be made, because it’s not that kind of film,” she said. “I don’t care how much I’m offered, it’s just not going to happen.”

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Space
NASA Is Posting Hundreds of Retro Flight Research Videos on YouTube
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If you’re interested in taking a tour through NASA history, head over to the YouTube page of the Armstrong Flight Research Center, located at Edwards Air Force Base, in southern California. According to Motherboard, the agency is in the middle of posting hundreds of rare aircraft videos dating back to the 1940s.

In an effort to open more of its archives to the public, NASA plans to upload 500 historic films to YouTube over the next few months. More than 300 videos have been published so far, and they range from footage of a D-558 Skystreak jet being assembled in 1947 to a clip of the first test flight of an inflatable-winged plane in 2001. Other highlights include the Space Shuttle Endeavour's final flight over Los Angeles and a controlled crash of a Boeing 720 jet.

The research footage was available to the public prior to the mass upload, but viewers had to go through the Dryden Aircraft Movie Collection on the research center’s website to see them. The current catalogue on YouTube is much easier to browse through, with clear playlist categories like supersonic aircraft and unmanned aerial vehicles. You can get a taste of what to expect from the page in the sample videos below.

[h/t Motherboard]

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