There are three main states of matter: solid, liquid and gas. When a substance changes state, this is a physical change because no new substances are produced and the change is reversible.

There are three main states of matter: solid, liquid and gas. When a substance changes state, this is a physical change because no new substances are produced and the change is reversible.

Chinese researchers observed a novel quantum state of matter, counterflow superfluidity ... making it an essential tool for studying the microscopic physical mechanisms of strongly correlated ...