When Yuri Gagarin became the first human in space, the reaction was, if anything, more electric than when Sputnik launched. On April 12, 1961, the Soviets successfully sent cosmonaut Gagarin into space and brought him back alive. | American Experience | PBS

120K views · 2K reactions | Astronomers tell us the untold story of man's first space walk and how it very nearly ended in catastrophe and was minutes away from the death of an astronaut. Watch more NASA's Unexplained Files on discovery+: https://bit.ly/3qtw8zd | Love Space | Facebook

On International Day of Human Space Flight, a look at the life of Russian cosmonaut Yuri Gagarin, the first person to enter outer space. | Reuters