How Did The Ancient Vikings Make This Super-Strong Sword?

How Did The Ancient Vikings Make This Super-Strong Sword?

When we look at the history of new technologies, we tend to think of only our most recent past. But more than a thousand years ago, blacksmiths succeeded in making a set of ultra-strong swords — that are tricky to re-create even today.

After reading about the technology behind the legendary swords of Damascus, Kinja-user Formless-One reminded us of another set of famous, very old swords — swords that were also a technological marvel of the time:

Consider this: making Damascus is not the only lost art of ancient weapon smiths. The Vikings also had swords made of crucible steel, known as Ulfberts (because that was the name stamped onto all of them, in accordance with Nordic tradition). This was before the 10’th century. Crucible steel wouldn’t be seen again until basically the dawn of the industrial revolution. This is big, because crucible steel is springier and tougher all around than Damascus and anything else from the time— Ulfberts were, materially speaking, the best swords ever made up until that point. Were they as sharp as Damascus? Probably not, but there is a limit to how sharp a sword really needs to be once you realize that they aren’t knives. Swords have a biomechanical advantage over knives because of their length— you can accelerate the tip of the weapon so fast and effortlessly that if they hit unarmored or lightly armored flesh, you can count on it cutting whether it is made of bronze, crucible steel, or Damascus. Thus, the advantage of crucible steel and other stiff-yet-springy steels that came around in the Renaissance period gave them durability and strength that you really want in a weapon. Those weapons were made to compete in an arms vs armor race where stabbing was often how you attacked a man in plate, that didn’t really happen in the middle east where Damascus comes from. In context, the weapons that came out of Europe were perfect for European warfare. The weapons made in India and the middle east were perfect for Indian and middle eastern warfare. And the two styles of warfare rarely came into contact during that time, except to some degree in Eastern Europe where there was contact with the Ottoman Turks.

A recent NOVA documentary featured swordsmiths from today attempting to re-create the Ulberfht swords, using modern techniques — a feat they did manage, but not without plenty of trouble along the way.

Image: Ulfberht sword, 850–900, From the Met’s Collection Lent by Laird and Kathleen Landmann, 2006

via Gizmodo
How Did The Ancient Vikings Make This Super-Strong Sword?

Professional Internet Troll Sues Her Former Employer

baegucb sends a followup to the news from March that professional internet trolls were operating by the hundreds at factories in Russia. A woman hired to be one of these trolls, Lyudmila Savchuk, spoke to the media about her job, which led to her being fired. She’s now suing her former employer and providing further details about how they operate. "The ‘troll factory’ operates based on very weird schemes, but all those firms are connected to each other, even though they are separate legal entities," she said. "I knew it was something bad, but of course I never suspected that it was this horrible and this large-scale." She describes how they flooded comment sections with pro-Putin responses, pushed out over 100 blog posts each shift, and doctored images to suit their employers’ needs. Savchuk is now gathering activists to oppose this form of internet propaganda.

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via Slashdot
Professional Internet Troll Sues Her Former Employer

This Video Shows How to Make McDonald’s-Like French Fries at Home

Many of us firmly believe McDonald’s french fries are the best french fries. You don’t have to head to the fast food joint for a nearly identical version you can make at home.

PopSugar takes the ingredients and process McDonald’s uses to reverse engineer their fries. Like Serious Eats’ copycat recipe, which we’ve salivated over before, PopSugar’s take uses peanut oil instead of the mix of oils McDonald’s uses (but omits the vinegar in Serious Eats’ version). This version also adds corn syrup in place of McDonald’s use of dextrose, to help the fries caramelize, and adds beef fat to replicate McDonald’s beefy flavor bath. As with making extra extra crispy fried chicken, you’ll give the potatoes a second fry for super crispiness.

Check out the very enthusiastic video above for the whole process or the link below for the text version. Or head here for more McDonald’s copycat recipes and tips.

The Homemade Secret to McDonald’s French Fries | PopSugar


via Lifehacker
This Video Shows How to Make McDonald’s-Like French Fries at Home

How to Win Your Physics Class Egg Drop Competition

How to Win Your Physics Class Egg Drop Competition

The problem is simple enough. You’ve got a raw egg, and it’s going to be dropped from a high place. You have to build a contraption so that it doesn’t break when it hits. Easy? Maybe. But how do you make it as light as possible? Or as small as possible?

These questions have had high school physics students pulling all-nighters for decades. Luckily for the generations to come, our good friend former NASA engineer Mark Rober is here to enlighten you. Just like with his Pinewood Derby video, he not only shows you some of the best systems for winning (depending on what the rules of your particular contest consist of), but it breaks down the science of exactly how each one works. Not only will this help you sound smart when your teacher asks you how you came up with it, but hopefully it will inspire you to try something original that’s based on these principles.

Personally, I don’t have any kids in high school, nor am I likely to be entering an egg drop contest anytime soon, and yet I was absolutely glued to this video. I don’t know what I’m going to do with this knowledge, but it’s probably going to be something fun. And I trust that these solutions will work. If he can safely land a rover on Mars then he can safely land an egg on the ground, okay? [Mark Rober]

via Gizmodo
How to Win Your Physics Class Egg Drop Competition