Thoughts about plants, games, King Arthur, and direct eye contact on public transportation.
Tuesday, June 16, 2015
Science Facts: Dry Ice
Dry ice is solid carbon dioxide and is made by putting carbon dioxide under high pressure and cooling it. At regular air pressure, dry ice turns into a gas at -78.5 C. Dry ice was discovered by a French scientist in 1835 who cooled carbonic acid to -194 F. I wonder how people produced temperatures that low in the 19th century.