Just managed to get around to watching last weeks episode (about elements) and I thought I understood it but I don't.
From what I understood there are 92 elements in the universe which make up everything. The elements 'come from' Hydrogen, the sun burns hydrogen to make helium, to make other elements it needs to be hotter.
Think I got that bit.
Then he said that when a star dies and explodes it is hot enough to create the rest of the elements. (think that's right)
So when it explodes it fires the elements through the universe? i.e all of the elements that are here are from an exploding star?
In which case how did the gold get so far underground? and why aren't there pieces of gold (and other elements) landing on earth? (the atmosphere burns them up?)
May be being thick, and perhaps he did explain it but I just lost the thread at that point :)