What is the rarest substance on earth?

@fidainc (410)
Singapore
December 21, 2006 8:48pm CST
What is the rarest substance on earth?
1 response
wyrdsister
@wyrdsister (584)
• Canada
22 Dec 06
Common sense!! :D Just kidding. According to a quick search, the most rare substance on Earth is the element Astatine. For some details, check this out. http://pubs.acs.org/cen/80th/astatine.html Enjoy! ~Wyrdsister
fidainc
@fidainc (410)
• Singapore
22 Dec 06
Is it the rarest cos' there's a demand for it and it hadn't replenish its stocks yet? Or just something hard to find in the first place?