How Scientists Discovered Helium, the First Alien Element, 150 Years Ago
First found only on the sun, scientists doubted the mysterious element even existed for more than a decade.
August 18, 2018 at 10:03AM
via Digg https://ift.tt/2ONFtN5
Friday, 17 August 2018
How Scientists Discovered Helium, the First Alien Element, 150 Years Ago
How Scientists Discovered Helium, the First Alien Element, 150 Years Ago
First found only on the sun, scientists doubted the mysterious element even existed for more than a decade.
August 18, 2018 at 10:03AM
via Digg https://ift.tt/2ONFtN5
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