Which is the change in size of a group of organisms of the same species over time? population growth
death rate
birth rate
immigration and emigration

The answer is overmatching

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11