What is the chance that these creatures didn't evolve on earth but on some other planet and comet and instead got transported here on a meteor. That would expla

What is the chance that these creatures didn't evolve on earth but on some other planet and comet and instead got transported here on a meteor. That would explain a lot of things as to why they evolved to stand 6 times the maximum pressure, temperature colder than ever recorded on earth, and their other attributes which are too extreme for even the most hostile environment on earth.