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In 1972, the same phenomenon was observed in helium-3 by American physicists Douglas D. Compared to hydrogen, which was also used in airships, helium has the added benefit of being non-flammable and fire retardant.
Owing to its unique properties – which include a low boiling point, low density, low solubility, high thermal conductivity and inertness – helium is used for a wide range of scientific and medical applications.
Helium was one of the first elements to be found to have superfluidity. Today, helium gas is used in a wide range of industrial, commercial and recreational applications.
In 1938, Russian physicist Pyotr Leonidovich Kapitsa discovered that helium-4 has almost no viscosity at temperatures near absolute zero (superfluidity). The most well-known is perhaps flight, where helium gas (being lighter than air) naturally provides buoyancy for airships and balloons.
It was independently isolated from cleveite the same year by chemists Per Teodor Cleve and Abraham Langlet in Uppsala, Sweden, who were able to accurately determine its atomic weight.
Over the course of the next few years, similar experiments yielded the same results.
However, in 1882, Italian physicist Luigi Palmieri detected helium on Earth when analyzing lava from Mount Vesuvius after it erupted in that year.
Ramsey sent samples of the gas to Sir William Crookes and Sir Norman Lockyer, who verified that it was helium. The bomb is officially called a GBU-43 or Massive Ordnance Air Blast (MOAB), the origin of its nickname as the “mother of all bombs.” Weighing more than 21,000 lbs., the weapon is the largest non-nuclear bomb ever used in combat.The bomb was aimed at the center of an ISIS cave complex in Afghanistan, CBS News national security correspondent David Martin reports.Whereas we tend to think of Helium as the hilarious gas that does strange things to your voice and allows balloons to float, it is actually a crucial part of our existence.In addition to being a key component of stars, helium is also a major constituent in gas giants.
The first evidence of helium was obtained on August 18th, 1868 by French astronomer Jules Janssen.