Alexander Mercieca is a high school principal, weightlifter, and certified CrossFit trainer in Huntsville, Alabama. He loves listening and playing to hip-hop, hard rock, and heavy metal music. He's a multitasker (the quality probably comes from being a principal), so Mercieca sometimes performs heavy lifts while playing music. Here, for example, he plays "Girls" by the Beastie Boys with one hand while benchpressing a barbell with the other.

A breakthrough in testing may have a global impact on the infrastructure we've built in dairy processing. When dairies produce milk, it is tested for protease, an enzyme that breaks down proteins. Protease is important for digestion, but it's not great for commercial milk supplies. Some milk products are more sensitive to protease than others. The problem is that protease testing normally takes about three days, and by the time the results get back, that milk has already been designated for fresh milk, UHT milk, yogurt, cheese, or other products. 

UHT milk, the shelf-stable kind that needs no refrigeration, is not all that popular in the US, but globally it makes up more than half of all milk purchased. It is particularly important in countries that do not have reliable refrigerated transportation and storage. UHT milk is also the milk product that is most sensitive to protease. A new testing process called Cybertongue, developed by PPB Technology in Canberra, Australia, can detect the amount of protease in milk in just three minutes! That means that milk with more protease can be diverted to make products like cheese that are less sensitive, or it can be treated with protease inhibitors. Milk with little or no protease can be made into UHT milk, which would extend its shelf life. The innovation could cut into the millions of tons of milk that are wasted every year. Read about Cybertongue and what it can do for the dairy industry at the Australian Broadcasting Company.  -via Metafilter 

(Image credit: Per Meistrup) 

Soccer fans (not FIFA fans) from all over the world are arriving in the US to attend the World Cup games, and for many, it's their first trip to America. Games are being held in the US, Mexico, and Canada. They've seen a lot of American culture in movies, but finding out it's all real is a different experience. What is impressing them the most? Our food! 

We often think of American cuisine as a mix of dishes from everywhere else, but in the US, we manage to put our own spin on it, and that's something you can't learn from the movies. Visitors are amazed by the size of our drinks, Taco Bell, Waffle House hash browns, french fries, gravy, and most of all, ranch dressing. You have to wonder what the rest of the world actually eats. I'm sure they will go home with an extra few pounds as a souvenir.   

Women as foot soldiers were not common the medieval era. After all, someone had to stay and tend the farm, the children, and the infirm while armies marched off to war. But when an invading army approaches the farm or the children, women can fight with a fierceness that defies all reason. In the case of royalty and the aristocracy, battles between nations often became personal, and queens, countesses, and duchesses were quite willing to command armies to defend their families and kingdoms. 

Jeanne Laisné grabbed an axe and defended the town of Beauvais, France, against invading Burgundians and became in inspiration to the townspeople. Tomoe Gozen was a distinguished horsewoman, archer, and swordswoman who fought in the Genpei War in Japan. Queen Matilda of Boulogne led supporters  against Empress Matilda to secure her husband King Stephen's release from bondage in the English civil war. And contrary to the first paragraph, a Viking woman named Lagertha fought so bravely as a foot soldier that king Ragnar Lodbrok married her. Medievalists.net brings us the stories of 15 medieval warrior women who led armies and defended kingdoms.  -via Strange Company 

Andy Brewer is an audio engineer and composer. He was playing around with pink noise, what we lay people would call static or just noise, on an equalizer and found he could extract musical notes from it with a little work. Could he play a song using just those notes? It would be a song without a voice or musical instrument. Yes, he could, although it was a lot of work. You wouldn't be able to do this if you didn't know a lot about music already. This song is technically "electronic music," and it's what a synthesizer (which is a musical instrument) does, although Brewer didn't use a synthesizer; just an equalizer. 

Music buffs in the comments said this is an additive synthesizer or a subtractive synthesizer. I don't know which is correct, but it took many people many years to develop the music synthesizer, while Brewer started from almost nothing and figured it out on his own. I'm impressed. The song is quite pleasant, too. -via kottke 

The world has always known people who just do not want to be told what to do. Sometimes it can be hard to draw the line between rebellion and mental illness, especially when you throw in exacerbating factors. Frances Farmer was a beautiful woman who became a movie star in the 1930s. Naturally rebellious, she could not abide the Hollywood studio system that had her under contract. They told her what to wear, who to talk to, and even who to marry. They prescribed amphetamines to keep her weight under control. Eventually, it became too much. 

Farmer was arrested several times in the 1940s for various offenses, in which she resisted arrest, even fighting the cops. She back talked a judge in a court exchange that reporters found hilarious. To keep her out of jail, Farmer was sent to a series of mental institutions, where she underwent electroconvulsive therapy, and she came out with stories of neglect, rape, and abuse that were common to such institutions at the time. She still made comebacks, in film, in television, and then on stage, but she never lost her rebellious streak. Read about the crimes of Frances Farmer at Messy Nessy Chic. 

(Image source: Photoplay, January 1937) 

Crazy cat lady that I am, I have a small part of my garden dedicated to catnip (and strawberries; they seem to get along well). The cats like it, and it makes my home the cool place for neighborhood kitties to hang out. But is there any evolutionary reason for cats to go crazy for catnip? Research has isolated the exact compounds that intoxicate cats, nepetalactone in catnip, and nepetalactol in silver vine, another popular cat attractant. 

Not only have scientists found how these compounds affect cats, but also why. It's an adaptive feature of their evolution! Cats rarely pay any attention to plants, but the cats who went for catnip or silver vine were more likely to survive and reproduce millions of years ago until a catnip attraction became quite common among several cat species on the African savannah. This TED-Ed video explains why with some charming cat animation, although you might not like one of the experiments that led to this knowledge. -via Geeks Are Sexy 

Dough Lisa is a bread artist whose sourdough work has become a viral sensation. Pictured above is one of her most recent creations: a groovy-looking loaf with woven threads of tie-dye dough covered with an outer black shell.

You can see her full process video here. It has eleven colors inside. The results when she cuts it open are extraordinary. It's like a human brain that's been drenched in the art of the 1970s.

Cinematographer Jamie McPherson took a crew to northern Canada to shoot footage of narwhals for the Netflix documentary series Our Planet in 2017. In his account of the trip, we will learn more about narwhals than about polar bears, but it was the bear that made the project dramatic. Narwhals gather at the edge of the ice in spring, waiting for the ice to crack so they can reach fishings grounds that were closed to them all winter. The crew got aerial footage in a helicopter, and underwater footage from a specialized crew, but they needed footage from the ground, meaning the ice, to round out the collection. For safety, they were using a boat.

They spotted the polar bear asleep as they prepared to set off in the boat. When the bear woke up and started running toward them, one crew member fired a warning shot to scare it off, but found the gun didn't work. They got the boat into the water in a hurry, planning to put some distance between themselves and the bear. But the boat motor didn't work, either. Since McPherson is telling the story now, you know he survived, and you can read his account at DiscoverWildlife. The moral of the story is to check all your equipment before going on an Arctic adventure. -via Damn Interesting 

The story of Lover's Lane is an urban myth about a couple who goes parking and narrowly escapes a horrible death. What we called "parking" is the custom of young people in a car finding a secluded space to canoodle away from prying eyes, and many towns have at least one road that is famous for such activities nicknamed Lover's Lane. The first part of this video explores the history of how parking itself became a thing. 

Then at about five minutes in, we learn about the very real crimes that may have sparked the urban legend. Or did the urban legend inspire the crimes? Since we don't really know how far back the legend goes, it's not quit clear. But for someone who wants to kill and get away with it, teenagers in a car on a lonely road present a tantalizing opportunity. 

The third section of the video goes into how these crimes and the Lover's Lane legend influenced the modern horror film. That seems only natural, since the target audience for these movies are young people who have the world in the palm of their hands, until they don't.

The soft, rolling melody of "Fields of Gold" is among British singer Sting's most famous songs. Here's a cover performance by The Petersens, a family band that is based in Bronson, Missouri. With a fiddle, a mandolin, a banjor, a gutiar, a double bass, and a dobro, this group offers bluegrass, folk, and traditional hymns.

The Petersens also present a folk version of "Dreams" by the Cranberries that is as uplifting as when Dolores O'Riordan first sang it.

On June 5, 1968, presidential candidate Robert F. Kennedy made his way through a crowd at the Ambassador Hotel in Los Angeles after winning the California primary. He was shaking hands as a bullet tore through him, and he was dead the next day. The last hand he shook was that of 17-year-old hotel busboy Juan Romero. Romero crouched down beside Kennedy, and became a subject in the photograph that everyone remembers from that day.

That photo brought Romero celebrity, but he had a hard time dealing with it. He was only a teenager, and was wracked with guilt. What if he hadn't gone for a handshake from Kennedy? Would the bullet have missed him? It didn't help that other people were thinking the same thing, and let him know about it. Romero lived with the "what ifs" for the next fifty years, until his death in 2018. But he eventually made peace with history, and was even able to talk about it. Read Romero's account of what happened that day, and how he dealt with the aftermath at Utterly Interesting. 

(Image credit: Sven Walnum) 

Bowling balls can be quite heavy. The United States Bowling Congress requires that they weigh between 10 and 16 pounds. That can be too much for people with limited hand strength or finger coordination, so it's fortunate that the governing organization for that sport accepts adaptive balls.

These balls made by different companies have retractable handles. As soon as the player releases the ball, the handle snaps inside. The ball can then roll down the lane with minimal distruption from the site of the handle.

-via Massimo

William Pool of Bolivar, Missouri passed away at the age of 101. He enlisted in the US Army in 1941 and served throughout World War II, including participating in the Battle of the Bulge and the long Allied offensive that ended in Austria.

Pool was a member of the Sons of Union Veterans of the Civil War, a fraternal organization that honors ancestors who fought for that side of the Civil War. In the 161 years since the conclusion of that war, the organization is in the hands of later descendants, but Pool's father was, literally, a Civil War soldier.

KY3 News reports that Pool's father, Charles Parker Pool, was born in 1844. He served in the 6th West Virginia Volunteer Infantry Regiment. He was 80 years old when his son, William Pool, was born in January of 1925.

Who was the last son of a Confederate veteran? What was Calvin Robertson Crane, who passed away in 2019 at the age of 102. Like Pool, Crane was a combat veteran of World War II.

-via Oliver Jia

When a cool science fiction weapon sticks around for half a century and gathers more and more fans and more fiction, there will be people who put way too much thought into it. The lightsabers from Star Wars were born out of a cool special effect, but now everyone wants one, or at least wants to understand them.   

What happens if you drop a lightsaber? Specifically, what happens if you drop one vertically, business end first, into the ground. Would it keep burning its way through the earth indefinitely? In the Star Wars universe, no, because there's a safety feature that disables the blade when it's not held. But there have been depictions of Jedi throwing lightsabers, so this feature apparently can be disabled. So what would happen in the real world? Rocket Riley goes through all the ways a lightsaber would act on earth, if there were such a thing. -via Laughing Squid