Life and the Universe - Cuntorio

We grow; we reproduce; we think. How did it all begin? Our universe began 10 to 15 billion years ago . The initiating event is described as the big bang.During the first 3 minutes after the big bang, as the universe began to expand, energy density reduced enough to allow protons, neutrons, and electrons to form. Some of the very lightest of the elements also formed, including some helium and