Shovelling snow can put strain on your heart. How to stay safe as millions dig out

There is almost nothing as captivating as a good magic trick. Watching something that defies gravity, odds, and the basic principles of physics and mathematics happen before our very eyes gives us an infusion of awe that feels incredible. Even knowing that it is an illusion, a well-executed trick, can cause a rush of astonishment that titillates both mind and body; it is a flat-out betrayal of expectations that can raise our heart rate in anticipation and, perhaps, a little fear, yet it comes at no personal cost to our well-being. And there is almost no one who captivates audiences with...