When helium is cooled to excessive temperatures, only a few stages faraway from absolute zero (-460 degrees Fahrenheit or -273 ranges Celsius), it becomes a superfluid, which means it could drift without friction, Scientific American reviews. It can climb up and over the edges of a pitcher, and it can leak thru molecule-thin cracks in a box. And here’s some other thrilling truth approximately this element: While helium is the second most ample element in the universe, it could absolutely be dangerous to the human frame—one of the many problems with birthday balloons nobody talks about.