• 6.9
    Chronicles of the Sun
  • 6.7
    Tagesschau
  • 5.5
    Mom for rent
  • 6.9
    Ici tout commence
  • 8.2
    FROM
1

Operation «Helium»

HTML tutorial
Documentary
1991 1.0 18
On the example of the history of the discovery of the "solar substance" Helium, the history of the most important discoveries in the field of physics and chemistry of the early XX century is given.