Cash value... ....
2007-02-27 12:41:53 · 12 answers · asked by Ecofreako 3 in Science & Mathematics ➔ Earth Sciences & Geology
Well, according to NASA it is anti-matter.
"Right now, antimatter is the most expensive substance on Earth, about $62.5 trillion a gram ($1.75 quadrillion an ounce)."
HTH
Charles
2007-02-27 12:50:12 · answer #1 · answered by Charles 6 · 1⤊ 0⤋
Astatine (element 85) is the rarest element on earth and there are never more than 30 grams (a teaspoonfull of it) on earth (deep in the earth's crust) at any one time. It forms a decay product of both Uraniusm-235 and Uraniusm-238, and its only isotope Astatine 210 is itself unstable with a half-life of 8.1 hours decaying to Polonium 210 and Bismuth 206.
Isaac Asimov wrote a 1955 essay on large numbers, scientific notation, and the size of the atom, in which he stated that the number of astatine atoms on Earth at any time was "only a trillion". That is how rare it is.
2007-02-28 03:30:07 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Pepperoni
2007-02-27 12:46:10 · answer #3 · answered by AL IS ON VACATION AND HAS NO PIC 5 · 0⤊ 1⤋
antimatter- in 1999 the estimated cost for 1 gram of antimatter was about $62.5 trillion.
2007-02-27 12:56:30 · answer #4 · answered by eiscubes 2 · 1⤊ 0⤋
This is hard to answer, since there are things that are extremely expensive, but practically noone want it. An unusual guess, race horse sperm.
2007-02-27 12:45:51 · answer #5 · answered by cattbarf 7 · 0⤊ 1⤋
Stardust? 36.6 billion dollars per carat.
http://deseretnews.com/dn/view/0,1249,635177181,00.html
2007-02-27 12:45:22 · answer #6 · answered by Lisa E 6 · 1⤊ 0⤋
If you are not referring to what backs up the dollar which is gold than it is the Earth's ecology to sustain life. And that is priceless.
2007-02-27 13:08:56 · answer #7 · answered by Yafooey! 5 · 0⤊ 2⤋
Embryonic stem cells.
2007-02-27 12:46:13 · answer #8 · answered by U Betcha 6 · 0⤊ 1⤋
monetarily I'm not sure, but it has to be air or water.
2007-02-27 12:46:16 · answer #9 · answered by Anonymous · 0⤊ 1⤋
probably like government stuff... i don't know, maybe diamonds or opals
2007-02-27 12:44:45 · answer #10 · answered by Anonymous · 0⤊ 1⤋