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What did Dewar's research help advance?

Botany
Cryogenics
Geology
Meteorology

Answer

Cryogenics, the study of extremely low temperatures, was significantly advanced by James Dewar's research. His invention of the vacuum flask, later known as the Dewar flask, provided an effective means of storing and handling cryogenic liquids. This enabled the development of new techniques for liquefying gases and studying their properties at extremely low temperatures.