@Matteo Romano Thanks for your question, Matteo. To ask such a question is to assume that there’s a beginning — it’s a huge assumption, isn’t it? As we investigate everything, one must also take into consideration the option that there’s no beginning at all. Our analytical and empirical work then is to comb through all evidence to see which assumption, which option, fits with the reality. The notion of beginning and ending is intrinsically linked to the notion of time, and if you investigate further, you will find that the so-called time merely reflects the periodic changes of that which exists in myriad forms — pure rotational energy. A particular form may have a beginning or ending, but taken as a whole, it’s simply a beginningless and endless process of self transformation of pure rotational energy. That’s why energy is neither created nor destroyed: it’s eternal. As you face the seemingly complex processes — all the changes, all the “uncertainties”, “entanglements”, or “mysteries” — all you have to do to reach the conclusion, to see the absolute truth, is to follow the basic principle of the conservation of angular momentum. The spatially finite universe spins forever — it’s what it is — within an infinite space of non-rotating energy. Together, that’s what you call the “cosmos”.