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Who discovered helium?August 18, 1868: pierre janssen discovered helium at guntur, india New helium reserve discovered • america heraldHelium: how was helium discovered.
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The Interesting Place Where Helium was First Discovered
Helium: How Was Helium Discovered
Who Discovered Helium? - Universe Today
New Helium Reserve Discovered in Tanzania Means We Aren't Running Out
Discovery of Helium in Guntur - Know the Facts | Info
August 18, 1868: Pierre Janssen discovered Helium at Guntur, India