It’s summertime, and in the northern hemisphere that means warm—often hot!—weather, longer days, balmy nights. In fact, it’s just the right time to be outside more. We do cookouts, we lie on the grass and contemplate the stars, we swim and hike and do all the things that, come January, we’ll remember with more than a little nostalgia.It’s natural in summer to feel closer to nature—after all, we spend more time outside in the midst of it! And nature,...