That's good info. I imagine there are lots of eggs that could've hatched successfully if given the chance after being exposed to less than ideal conditions. I didn't expect that mine were viable, but I'm so darn nosey! I always eggtopsy quitters, so I candled to make sure they had expired before cracking them open. To my surprise they were very much alive!
I've read accounts of people incubating store bought fertilized eggs that have been refrigerated. I can see how that works as long as they don't freeze entirely. The surprising part is that they aren't treated like hatching eggs and still manage to hatch. They just sit there in the carton without being turned, very low humidity, etc. Of course, the hatch rate isn't usually good and a higher rate of deformities have been noted. I'm still impressed. Lol.