I was left wondering how come the models we have of the birth of the Universe don’t tell us about dark matter and energy being formed (and thus what it is and how to look for it). I guess it works the other way round, we need to know the properties of something before we start working out explanations of how it came to be. But then again, if something so pervasive as dark matter is real and yet missing from the current origin models, I’d expect them to make all kinds of false predictions.