The Haynes Build Your Own V8 Engine ($65.62) sounds fantastic -- the lengthy selection of positive reviews confirm the manufacturer's claim that a "talented 10 year old" could assemble it, and it can be disassembled and reassembled, which makes it great for classrooms, camps and studios. (via Red Ferret)
This is a thermonuclear weapon, lodged in a field in North Carolina where it landed after falling from crashing B-52 on January 24, 1961. Some new documents detailing the history of the Goldsboro Incident were declassified this week.
Besides information the history of Goldsboro and several other near-disaster, the documents focus on problems with nuclear arsenal safety during the Cold War. The documents particularly focus on issues with weapons design. At Goldsboro, for instance, the weapons ended up armed (increasing the risk of an actual detonation) because the manual arming switch was designed in such a way as to allow it to turn itself on in response to the force of the plane crash.
The documents also discuss the risks of "sealed-pit" weapons, which were designed with the plutonium or uranium core already sealed into the warhead — unlike earlier designs that required operators to insert the nuclear material when the bombs were ready to be used. The sealed-pit design greatly increased the risks associated with lost or accidentally dropped bombs, as in the case of Goldsboro.
In 1970s, the CIA used this ship to capture a sunken Russian nuclear submarine — i.e., lifting a 2000-ton object from a depth of three miles to the surface. It was the most expensive intelligence operation ever and it only kind of worked.
MIT researchers built a 70-pound robot "cheetah" meant to demonstrate the high efficiency of a new electric motor design. Among other improvements, the design enables the impact energy of the robot's leg hitting the ground to be captured and fed into the robot's battery. Soon, they expect the motors to enable the cheetah-bot to gallop at 35 mph which, of course, is still just half the speed of a real cheetah. However, it will hit those speeds much more efficiently than other running robots. Read the rest
Read the rest
The term "gonzo journalism" gets thrown around pretty loosely, generally referring to stuff that's kind of shouty or over-the-top, but really gonzo stuff is completely, totally bananas. Case in point is James Mickens's The Slow Winter [PDF], a wonderfully lunatic account of the limitations of chip-design that will almost certainly delight you as much as it did me.
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Read the rest
The iceberg wasn't the only thing that took down the Titanic, explains Yale University materials scientist Anissa Ramirez. Instead, cold temperatures in the icy North Atlantic changed the behavior of the materials that made up the boat — changes that reduced the ocean liner's ability to withstand a head-on iceberg collision.
Check out more Anissa Ramirez science videos
507 Movements brings to life Henry T Brown's 1868 treatise "Five Hundred and Seven Mechanical Movements, Embracing All Those Which Are Most Important in Dynamics, Hydraulics, Hydrostatics, Pneumatics, Steam Engines, Mill and Other Gearing, Presses, Horology, and Miscellaneous Machinery; and Including Many Movements Never Before Published and Several Which Have Only Recently Come Into Use," and includes selected animations of the mechanisms. Hypnotic and educational!
Tonight, PBS NewsHour science correspondent Miles O'Brien will serve as master of ceremonies in a Kennedy Center gala honoring the life and legacy of astronaut Sally Ride. The tribute will highlight her impact on the space program and her lifelong commitment to promoting youth science literacy.
At the PBS NewsHour website, read the column Miles wrote immediately following Ride's death in July 2012, 17 months after she was diagnosed with pancreatic cancer.
Geoscientist Matt Kuchta explains why wet sand makes a better castle than dry sand — and what you can do to make your sand fortress even more impenetrable. Hint: The secret ingredient is window screens.