The loudest sound ever heard on Earth was the eruption of Krakatoa in 1883.  The Indonesian volcano ruptured the ear drums of sailors 40 miles away, and people 3,000 miles away reported it as “a distant roar of heavy guns.” To put that in perspective, it would be like sitting in Boston and hearing a noise that came all the way from Dublin.  (, )

Traffic jams would be greatly reduced if people stopped tailgating.  2017 research from MIT shows that if we all kept an equal distance between both the car in front of and the car behind us, like how birds fly in flocks, we would get to our destinations nearly twice as fast.  (, )