Liquid nitrogen is fun stuff to play with, as long as you’re careful and avoid freezing your own fingers off and shattering them on the workbench. As the liquid turns to gaseous nitrogen at ...

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A few years ago the folks at Oculus had an idea – because of cellphones, small, high resolution displays are really cheap, so why not make VR ... when you put liquid nitrogen under a vacuum?

Even though ice is at 0 °C, the molecules still vibrate. After freezing, the water molecules are further apart than they were as liquid water. As solid ice, the molecules are further apart, arranged ...