Well no one really know who dicoverd it. But the Chinese found it in over 2000 B.C and than passed down
Mercury is basically a chemical element. Its best property that differentiates it from other elements is that it is liquid at room temperature. It is considered as a transition metal.
Mercury is one of the oldest chemical elements in the world. It has been in use since ancient times. The Chinese people from the ancient times used it as well as Egyptians. Chinese used it as they believed it has enormous healing powers. They thought it could prolong life, heal fractures etc. Historians claim that Egyptians used it since 1500 B.C.