I’ve tried croakies and other sunglass straps—but those always get messed up in my hair ... blocks ventilation, my Pit Vipers do overheat and fog up. But there’s a plastic bar on the brow that helps ...

Pit vipers, along with several of their snake cousins, marry two senses to better locate prey at night: sight and a heat-detecting ability. Deep pits, which lie on each side of the snake's face ...