The Big Bang theory is the current accepted cosmological model. It outlines the universe story.
Following the observation that ignited its creation, the model is intuitive. However, some common questions arise. What is the universe expanding into? What happened before the big Bang? What banged?
This essay answers these questions by setting the model in the proper background that is the theory of Relativity.
Our human genome is full of viruses similar to HIV-1. These have played an important role in human evolution and still play an important role in human embryology and day-to-day chemistry. Just how important are they to our evolution past and future?
