Lloyd Alter, 19 February 2010, Canada: TreeHugger - Cars & Transportation
Here is an interesting idea for a helmet, designed for motorcyclists but that might work for cyclists and skateboarders down the road. 80% of fatal motorcycle accidents are caused by head trauma, and most of those are from "rotational acceleration" and subsequent "intracranial shearing"- the head is turned rapidly and the brain, floating loosely inside, sloshes around a few milliseconds later, tearing blood vessels and nerve fibers.
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