Fact for week 4

FACT:

Anti-gravity Helium:

Did you know that it has anti-gravitational properties when it's in liquid form too? Super-cooled helium has two different liquid forms.

The first kind, Helium 1, happens between -455 and -452 degrees Fahrenheit, where it is almost impossible to see. The second type happens when it gets colder than 2.18 Kelvin and that is when things get weird.

Helium super-cooled below 2.18 K stops obeying the laws of gravity. It turns into a super-fluid that can climb up the walls and out of its container. Super-cooled helium is as close to a friction-less material as we've discovered thus far.