Fact of the Day: 17/12/2020
The gaseous form of the element helium is lighter than air, which allows it to “defy the laws of gravity” to make things – like balloons – float. But did you know that the liquid form of helium also has anti-gravitational properties? When helium is cooled between 2.59 Kelvin and 4.26 Kelvin, it’s still in gaseous form. However, when it is cooled to 2.18 Kelvin, it changes to liquid form, though it’s not the liquid you’d typically expect. Liquid helium floats up walls and climbs out of containers. Pretty cool, huh?
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