Finding the Longest Straight Line You Could Sail Without Hitting Land

Back in 2012, a curious debate emerged on the discussion website Reddit, specifically on a subreddit called /r/MapPorn. Here the user Kepleronlyknows posted a map of the world purporting to show the longest navigable straight-line path over water without hitting land. The route began in Pakistan and followed a great circle under Africa and South America until it hit eastern Russia.

Source: technologyreview.com