The importance of E = mc2
The big bang theory would not make sense if it weren't for this famous equation. How can matter be created from ‘nothing’? Well, the singularity before the Big Bang was not ‘nothing’. It was a huge amount of energy (with no mass) concentrated into a tiny point. Einstein proposed that energy could be changed into matter. His equation, E= mc2, describes the change. E represents the amount of energy in joules, m represents the mass in kilograms and c is the speed of light in metres per second (300 000 000 m/s).