Why not discuss in a practical way for some members about tracing the elements and atoms to the big bang. According to the b.b.c. they have trace the elements back to the black holes.There were many steps to prove such as super novas. It was combination of steps to prove the big bang theory. The atomic theroy was also explained,the University of Manchester U.K. was a starting source.. Why not look at it, If you need more of a information source.