Kathy Hall: The Big Bang and its Aftermath
1. The Big Bang in a nutshell + 3 lines of evidence
2. The First 380,000 years.
3. Dark Matter and Dark Energy.
I will be explaining how the Big Bang theory is the best we have but it is certainly incomplete – we do not know what 96% of the matter-energy in the Universe is and there is no explanation of why the fundamental constant take the values they do or whether there are other Universes out there.