We Don't Have Carbon and Oxygen Yet

In order to make carbon and oxygen, which are a few steps up the chain fusing lighter elements, you need stars to burn sort of a long time. Short lived stars burn really hot and fast and just sort of like convert all the hydrogen into helium and then explode. And so you need to wait maybe like a billion years after the big bang for those smaller, longer burning stars to give up all the carbon and oxygen they've been making at the core. So now we have enough of these rocking materials probably to come together and form planets. We have oxygen, we have carbon, but we've already spent a billion years like thing about all that time that's past. It's incredible