strontium

The mystery of why ancient South Americans, who created the scene of Nazca Lines (Nazca Lines), also gathered skulls like trophies that had long ago caused scholars a headache.

Waste water containing radioactive materials from Japan's Fukushima I nuclear power plants leaked to the Pacific Ocean.

New materials in the form of silicon dioxide compounds (SiO2) can absorb radioactive iodine and strontium by changing the compound type.

The world's most accurate atomic clock will only deviate a second for 15 billion years.