After the airship Hindenburg II burned up because of the Hydrogen gas it used. Over 200 people were killed. After this, people realized that Hydrogen was too dangerous to be used. So, they started using Helium, an inert gas.
Helium was discovered in 1868 by French astronomer Jules Janssen during a solar eclipse while observing the sun's spectrum.
Chromium was discoverd by Nicolas-Louis Vauquelin in 1797.
Nicolaus Copernicus
The first people that lived near them.- There is no single discoverer
helium in a jar diff from helium atom
march 1781
Hydrogen was discovered in 1766.
i cant give the year but i can give this they were discoverd by indians.
A definite year cannot be put on it, but it is over 8000 years ago.
peru was discoverd around the turn of the 16th century
Helium was discovered in 1895 by William Ramsay.
Remains of a carpic settlement old of 2300 years was discoverd here.
The ozone layer was discovered in the year 1913 by the scientists Charles Fabry and Henry Buisson.
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Plutonium was discovered in the year of 1940. It was discovered by multiple scientists: Glenn Seaborg, Edwin McMillan, Arthur Wahl, and Joseph Kennedy.
Justin Bieber Posted A video of himself singing on youtube and got discoverd