The Lightest Form Of Water Yet Discovered: Gel-like Ice

It may come as a surprise to most that there’s not just one type of ice. In fact, there are 17—varying substantially in structure and weight—and an 18th “in development.” Only two types appear naturally on Earth, the common hexagonal version and upper-atmosphere cubic ice, but scientists have been able to produce “a type of porous, lightweight ‘aeroice’” according to New Scientist. Pressure causes variations …