Something that Brian didn't mention, but which was pointed out by Elon Musk, is that the strength of stainless steel increases at cryogenic temperatures. (H/T @eric3579)

posted by Aard Vark (oritteropo) 1 year 4 months 3 weeks ago • 619 views • 12:09

YouTube description: While steel reinforcement solves one of concrete’s greatest limitations, it creates an entirely new problem: Corrosion of embedded steel rebar is the most common form of concrete... continue reading

posted by Aard Vark (oritteropo) 1 year 9 months 1 week ago • 246 views • 7:49

YouTube description: The Galton Board is a 7.5” by 4.5” desktop probability machine. This device brings to life the statistical concept of normal distribution. As you rotate the Galton Board... continue reading

posted by Aard Vark (oritteropo) 2 years 1 month 3 weeks ago • 798 views • 3:23

YouTube description: In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny,... continue reading

posted by Aard Vark (oritteropo) 2 years 4 months 3 weeks ago • 724 views • 3:34

YouTube: Which marvel of nature can build a 2 metre Orb Web with a silk that ranks as the World's toughest natural fibre? - The answer is the Darwin's Bark Spider and this real life "Spider Woman", no... continue reading

posted by PlayhousePals 3 years 1 week ago • 1,543 views • 4:09

The Lahti L-39 is a Finnish 20 mm anti-tank rifle used during the Second World War. It had excellent accuracy, penetration and range, but its size made transportation difficult. It was nicknamed "Norsupyssy"... continue reading

posted by Mordhaus 3 years 1 month 1 week ago • 93 views • 10:14

The Ulfberht swords were made during a brief period of the MIddle Ages, roughly around 200 years. The quality of the steel and forging techniques were not rediscovered in Europe until the industrial age... continue reading

posted by Mordhaus 3 years 4 months 3 weeks ago • 462 views • 19:15

At Autodesk's Pier 9 workshop in San Francisco -- and no, this isn't an ad, pull down the description for more! -- there are giant robot arms using welders to 3D print with stainless steel. Which seemed... continue reading

posted by Mordhaus 3 years 7 months 2 weeks ago • 780 views • 4:51

A 130lb bow with a very hard arrowhead shooting at a steel breastplate at twenty yards. Will it penetrate?

posted by Mordhaus 3 years 9 months 3 weeks ago • 529 views • 3:23

As urban populations continue to rise, innovators are looking beyond traditional farming as a way to feed everyone while having less impact on our land and water resources. Vertical farming is one solution... continue reading

posted by Mordhaus 3 years 12 months ago • 828 views • 3:38

"A heavy steel vault protects 2 cassettes that each hold over 1,000 bills. A sophisticated assemblage of sensors, rollers and conveyors ensures the correct number of bills is distributed to the account holder..." ... continue reading

posted by ant 4 years 2 weeks ago • 23 views • 2:57

You’ve seen the Terminator die in molten steel and Gollum die in the fires of Mount Doom, but is it really that accurate?

posted by Mordhaus 4 years 2 months ago • 306 views • 7:01

If you're keen to live out your own "Game of Thrones" battle fantasy (ahem, good luck), see Richard Furrer. The Wisconsin-based blacksmith forges Ulfberht style swords, the name given to a group of uncommonly... continue reading

posted by blacklotus90 4 years 2 months 1 week ago • 265 views • 2:23

So neat to know. Helpful in every way brazen.

posted by BoneRemake 5 years 4 months ago • 229 views • 3:31

how to make a hank (hang?) from used propane tanks

posted by newtboy 6 years 1 week ago • 423 views • 32:32