Vaccines like to be kept cool, none more so than the Pfizer candidate for Covid-19, which has to be deep-frozen. And that's going to be an issue for developing countries -- and for rural areas in the ...

A man in a lab coat carries a box of dry ice - Eder Paisan/Shutterstock Dry ice is the solid form of carbon dioxide and the perfect trick to keeping ice cream frozen in your cooler thanks to it being ...

Dry ice is solid carbon dioxide. At its surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees Celsius), a frozen block of dry ice transforms directly into a gas, skipping the liquid phase ...