Rarest material?

[Saltire]

Cecil did a column years ago on the most expensive thing in the world:

http://www.straightdope.com/classics/a1_329a.html

[jbird3000]

*Originally posted by Achernar *
**Right you are. Nothing above Uranium is stable. Ca[sup]252[/sup] has a half-life of 2.6 years. I imagine that the ridiculously hard-to-make stuff is effectively nonexistant. For instance, if humans are the only intelligent beings in the Universe, then I would guess that there are currently 0 atoms of Meitnerium-226, which has a half-life of 3.4 milliseconds, in the Universe. **

Hey, why not combine two ideas? Anti-Meitnerium-226!

[Squink]

The inflationary model also solves the magnetic monopole problem, because in the particle physics that underlies the inflationary idea, there would only be one magnetic monopole per vacuum energy bubble. That means only one magnetic monopole per Universe.
   That’s why the inflationary universe theory is still the favored pre-Big Bang cosmology among cosmologists.

http://superstringtheory.com/cosmo/cosmo41.html