The Earth is not always your friend, and the planet upon which we developed may not treat us gently despite the effort with which we have colonized so much of its surface. In this account, we move beyond familiar floods, tornados and earthquakes to discover the really weird ways that an active and sometimes badly behaved planet can create a real but strange threat to your safety. Learn, and be safe; looking out not only for wild animals, but approaching the planet itself with care as you walk its surface.
10. Tree Wells
The Earth is defined by interactions between the rocks, the atmosphere and water. And when that interaction involves the accumulation of frozen water in the form of snow in places where there are trees, an extraordinary level of danger may form. It is not only a crevice that may threaten skiers. A much more common and sometimes worse danger comes from tree wells. Tree wells are an everpresent risk on mountainsides that suffocate many unwary snow sports enthusiasts when they fall into a gaping hole in the snow where a tree stands, concealing the snowy well around its trunk.