Carbon is really the most important element in the universe for a variety of reasons. It enabled this whole evolution that we're now observing and literally seeing in the sky. So combined with the fact that you have the iron deficient, all of that is probably important to creating humans. We need all the elements. But if you don't have stars, you know, like the sun, small stars that can actually host planets that have long lifetimes,. You need long long lifetimes if you want to have a stable planet and develop humans.