'In 1919, barely 20 years after its discovery, it was the world's most expensive substance at $3 million an ounce'
radium
SCIENTIFIC DISCOVERIES: In 1919, barely 20 years after its discovery, it was the worlds most expensive substance at $3 million an ounce
In 1919, barely 20 years after its discovery, it was the world's most expensive substance at $3 million an ounce
In 1919, barely 20 years after its discovery, it was the world's most expensive substance at $3 million an ounce
SCIENTIFIC DISCOVERIES
radium
SCIENTIFIC DISCOVERIES