The Hardest Thing To Find In The Universe?
From NPR:
What is rarer than a shooting star?
Rarer than a diamond?
Rarer
than any metal, any mineral, so rare that if you scan the entire earth,
all six million billion billion kilos or
13,000,000,000,000,000,000,000,000 pounds of our planet, you would find
only one ounce of it?
What is so rare it has never been seen
directly, because if you could get enough of it together, it would
self-vaporize from its own radioactive heat?
What is this stuff
that can't be seen or found? Well, here's a hint. It's sitting modestly
in a lower row in the Periodic Table, down on the lower right, in a box
marked "At."
"At" stands for astatine. It is an element with 85 protons packed into its nucleus, thus the atomic number "85" ...MUCH MORE
