<p>The Simple Secret of Runway Numbers</p><p><a href="https://www.youtube.com/watch?v=HSRmfNDk87s" target="_blank" rel="nofollow noopener noreferrer" translate="no"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=HSRmfNDk87</span><span class="invisible">s</span></a></p><p>I learned a surprising amount of Physics and Geography from this video about runways :blobcatgiggle:</p>