#04
ezontheearth.com
Tritium $30,000/grams
The world’s 4th most expensive material can be found in the EXIT signs. It contains hidrogen’s radioactive isotope – that is why the letters are glowing on those signs.
Cosmopolitan Female Magazine
Cosmopolitan Female Magazine
#04
ezontheearth.com
Tritium $30,000/grams
The world’s 4th most expensive material can be found in the EXIT signs. It contains hidrogen’s radioactive isotope – that is why the letters are glowing on those signs.
