> The physical reality is that average January lows in NYC are 20 degrees lower than in SF. The physical reality is that 20 degrees lower isn't that bad. Human

> The physical reality is that average January lows in NYC are 20 degrees lower than in SF. The physical reality is that 20 degrees lower isn't that bad. Humans have thrived in colder climates for thousands of years. Being a human being in a modern day NYC/Chicago winter is a cakewalk, unless you are among the small subset of people who treat anything below 60F like its a death sentence.