<p>Less than 150 Brazilians or 0.00001 percent of the national population completed the challenge that our author Sara Velloso concluded between 2011 and 2019. She ran the six biggest and most traditional marathons in the world crossing the finish line always before the deadline in the cities of Berlin, Boston, Chicago, London, New York and Tokyo. This challenge is called Six Majors, something like the "six major ones", in free translation.<br><b...