2021-05-31 14:50:22 UTC
A Philadephia Inquirer headline notes that "water ice" is one of the incentives
offered to people who get vaccinated for COVID-19 in Philadelphia.
Usually, when I read the phrase "water ice", it's because I'm reading about
the Martian polar caps, and it is necessary to clearly distinguish between
what we usually think of ice, and "dry ice", or frozen carbon dioxide.