“This concept is intuitive, and yet when we watch extremophiles, from emperor penguins braving the Antarctic chill to camels trekking over scorching sands, it’s easy to think that they are suffering throughout their lives. We admire them not just for their physiological resilience but also for their psychological fortitude. We project our senses onto theirs and assume that they’d be in discomfort because we’d be in discomfort. But their senses are tuned to the temperatures in which they live. A camel likely isn’t distressed by the baking sun, and penguins probably don’t mind huddling through an Antarctic storm. Let the storm rage on. The cold doesn’t bother them, anyway.”