Superfluidity is a quantum mechanical effect that occurs at temperatures near absolute zero. As the temperatures of certain fluids approach this value, they undergo a transition to a zero-viscosity ...

See what moon phase it is tonight and find out when you can see the rest of the moon phases for 2025. Today, April 9, 2025, the moon is 11 days old and is in the Waxing Gibbous phase of its lunar ...