It is 28 degrees Fahrenheit on top of this mountain, before you factor in the wind that’s blowing snow sideways into my face. I’m sitting on a rock with my soda can-sized backpacking stove the size of a soda can trying to make lunch and regretting my decision to go hiking in the middle of February. I press a small button on a pen-size rod that I’m holding over the burner, bringing a spark to life for just an instant. The familiar whoosh of gas igniting means I can start heating up ramen — lucky me.
But wait, how did pressing that button cause a spark? My lighter doesn’t have a flint and steel or any batteries. It’s not even solar powered (not that I remember what sunlight looks like; it’s winter in Washington). So how can it start a…
