Where Your Elements Came From
"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself." - Carl Sagan
Are the dark grey elements all not naturally occurring?
source:https://goo.gl/12uXpF
"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself." - Carl Sagan
Are the dark grey elements all not naturally occurring?
source:https://goo.gl/12uXpF