Why Airports Rename Runways When the Magnetic Poles Move Ifeadi C. 04:21 Feed: All Latest, Zero Tech Blog Magnetic north changes by as much as 40 miles per year, and that means signage updates. via Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsA letter from the front lines of the 'Rick and Morty' McDonald's sauce warAll the places celebrating Indigenous Peoples' Day instead of Columbus DayMalala starts classes at Oxford, five years after she was shot for speaking out about women's educationChance The Rapper gets pulled over by police and livestreamed the whole thing on InstagramHere's why you should care about Richard Thaler, the rockstar economist who just won the Nobel PrizeThe SpiderMAV does whatever a spider can, spins a web, any size