You and your friend are sitting at the park. You both are looking out at the distant cityscape. She just told a joke, you are struggling to inhale because of all the laughter and are wondering if this is one of the best moments of your life. When you…

Once I wake up at 5am, it takes me about 30 minutes to dress up and bike to the gym. For the few months around the summer solstice it is bright when I leave my house, but for most of the year it is dark, and I bike through the streets using the soft…