Talk "What is this Big Bang? Can you explain it to us?"

By Emili Elizalde, ICE-CSIC and IEEC, Campus UPC, Bellaterra What is this thing we call the Big Bang? Many people think they have it clear, but in fact it is a concept that is quite difficult to understand. To begin with, there is a little gibberish: on the one hand, we have the Big Bang singularity, on the other, the cold and hot Big Bang models, and the Big Bang theory that they show on TV... Which version do we stick with? So at first glance, the singularity may seem like the most rigorous…