A pellet of “dry ice” floats on a shallow bed of water shooting off gaseous of carbon dioxide as it warms. The dry ice is solid CO2 which sublimates directly to gas as it warms up (skipping the liquid phase altogether).
(Photo by Steve Jurvetson) Photo used under CC BY
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I had spent many years pursuing excellence, because that is what classical music is all about... Now it was dedicated to freedom, and that was far more important.