“One would think that the earliest bike helmets that were made would be less effective than the ones that are made today, but we’re actually seeing an opposite trend: it has become less safe to wear a bike helmet over the years, and that is surprising. The earliest helmets were modelled on motorcycle helmets and covered the entire head. The bicycle helmets that people use today have ventilation holes to keep the head cool. Studies that have compared these two types of helmets have shown that the new type provides less protection than the old one.”
Read the full article:
http://sciencenordic.com/bike-helmet...ctive-we-think