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In the ’80s, We Decided Bike Helmets Make Riders Safe. Cyclists Have Paid for It Ever Since.

Good review of the complex science around cycle helmets and safety. The article also touches on the unintended effects of helmet mandate laws (which have been repealed in many US cities). Shout out to Ian Walker of Swansea University and his heroic measuring of passing distance of vehicles with various...
Source: slate.com