# data[].attributes.body
rocket fuel

welding

production of hydrochloric acid

reduction of metallic ores

for filling balloons

hydrogenation of fats and oils

# data[].attributes.body
In 1671, hydrogen was discovered and described from iron filling and dilute acids , by a Robert Boyle. The name came (from the Greek ὑδρο- hydro meaning "water" and -γενής genes meaning "creator". Later in 1898 , it was liquefied by James Dewar , for the uses of  regenerative cooling and his invention, the vacuum flask.