Currently accepted scientific theory says that all elements heavier than hydrogen, helium, and a little lithium have been created in supernova explosions.
My questions, specifically, is has anyone done the math to see if the observed amounts and the distribution of, the heavier elements in the universe agrees with the 13.7 billion year age of the universe?
With the birth, life, and death of stars at the currently observed and accepted rates... does the math work out? Can you please refer me to a resource where I can review the material or get further clarification. (I freely admit that my maths aren't up to the task, but I'm hoping for a deeper understanding of the phenomenon.)