Remarkable as it may be, the habitable zone is not the only precarious situation enabling life to exist. On today’s list, we’re going to go over 25 precise things that show hos precarious life really is. A slight deviation from any of these examples could spell the end of life as we know it. It’s a bit scary when you think about it and it’s definitely a reason to pause and consider. Life is fragile. We’re literally hanging by a thread.