Video: Burn metal hot enough and you can do whatever the hell you want with it. Here's a glimpse of how a coil spring, which is used in a car's suspension, gets made. It's interesting that even though the machines do most of the work in shaping the spiral, there are still a lot of hands involved in transforming the rod into the final spring. Imagine accidentally dropping it on your foot.
Watch A Red Hot Metal Rod Get Wound Up Into A Coil Spring
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Photo. Getty Telsa agreed this week to a settlement in a class action lawsuit filed against the company by buyers of Tesla vehicles who alleged the company semi-autonomous, assisted driving feature was "essentially unusable and demonstrably dangerous."
If you want to send something deep, deep into space, it's impractical to load it up with lots of heavy propellant. Scientists with their eyes on long-distance space travel have contemplated thrusters that wouldn't need any propellant at all. The EmDrive, a copper cone that would supposedly push forward on the vacuum of space without any propellant, is one such idea — unfortunately, it's probably another dead end.