Put Your Scientific Knowledge to the Test!

10%

What does the H stand for in the chemical formula H2O?

Hydrogen

Hydration

Hexagon

Helium

Dental fillings have a long history. Archaeological findings in Slovenia show that 6,500 years ago, cavities were filled with beeswax.

Dental fillings have a long history. Archaeological findings in Slovenia show that 6,500 years ago, cavities were filled with beeswax.