Dry ice

Dry ice is the solid form of carbon dioxide, which was discovered to be capable of cooling a liquid to the point of solidification without the need for lower ambient temperature. This was the lwest temperature reached in the laboratory, lower than any temperature ever recorded anywhere on Earth.
 C.S.A. Thilorier France 1835 Dry ice

Dry ice is the solid form of carbon dioxide, which was discovered to be capable of cooling a liquid to the point of solidification without the need for lower ambient temperature. This was the lwest temperature reached in the laboratory, lower than any temperature ever recorded anywhere on Earth.