Liquid Helium

Liquid helium is helium gas cooled to extremely low temperatures, below about -452°F (-269°C), making it a liquid state. Unlike most substances, helium remains liquid at very low temperatures due to its weak atomic interactions. It is used primarily in applications requiring super-cooling, such as cooling the magnets in MRI machines, because it can reach temperatures near absolute zero. Liquid helium is unique because it exhibits superfluidity, flowing without resistance, which allows it to move effortlessly through tiny spaces. Its properties are vital in scientific research and various high-tech applications involving cryogenics.