helium

a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

खाने पीने की चीजों को ठण्डा रखने के लिये"helium"गेस काम आती है.

whether the professionals, the real professional helium physicists,