Riding motorcycles make you smarter according to the inventor of Brain Age. His study found that riders had better mental acuity than non-riders.
Because riding a motorcycle requires a high level of alertness and
rapid problem solving, Kawashima found, “the driver’s brain gets
activated by riding motorbikes.”
The real gist of this piece confirms that there is such a thing as brain atrophy. If you aren’t challenging yourself -and your brain- you’re slowly degenerating. So even if bikes aren’t your thing, finding something challenging for your body and mind has a good deal of fringe benefits. What this piece doesn’t explain is why I do so many stupid things while riding.
The sheer number of pieces is just mind boggling. And for a race car of any stripe everything has to be right for there to be a chance of being near the top at the end. In my mind, this is the hardest part of racing. A driver can only make so many mistakes, but for a mechanic the possibilities are almost endless. Think about that the next time you see a race car finish a race. No matter what place the car finishes it is a triumph. It is a triumph of a small group of people against infinite possibilities to screw the pooch.
tl;dr black powder and gunpowder must be under pressure to properly deflagrate, and they’re unassuming
They are cheap, easy to build and inconspicuous. And as the explosions this week at the Boston Marathon show, pressure cooker bombs can be devastatingly effective weapons.
But why would someone place a bomb inside a common kitchen implement? As we explained two years ago in an article about the increased use of pressure cookers (for cooking, not bombs):
“It works using basic principles of science: Water normally boils at 212 degrees Fahrenheit — and doesn’t get hotter. But under pressure, it boils at about 242 F and stays there. Raising the boiling point lets the food cook at the higher temperature, which cuts cooking time by two-thirds or more.”
The same principle that increases the boiling point inside a pressure cooker also can be used to amplify the force of an explosive.
As NPR science reporter Geoffrey Brumfiel notes, “If you seal a pressure cooker, the steam builds up in the vessel. It helps to raise the temperature and cook food, but sometimes when the cooker fails, you get a very energetic release.”
Bruce Schneier’s a security specialist with his own Internet meme. And while most people believe that technology elevates, improves things, Schneier holds that technology magnifies, makes things bigger, good and…