<blockquote><a href="http://boingboing.net/2016/01/17/the-bizarre-magnetic-forest-ri.html"><img class="alignnone size-full" src="http://ontarioexploration.com/wp/wp-content/uploads/2016/01/ForestRings1.jpg" alt="" /></a>Geoff sends us a post about “the ‘strange phenomenon’ of naturally-occurring ‘forest rings,’ or circles up to 2km in diameter only visible from the air, in northern On…</blockquote>Source: The bizarre magnetic forest rings of northern Ontario / Boing Boing