What is a limiting factor? A. A factor in the ecosystem that causes population growth
to decrease.
B. A factor in the ecosystem that eliminates several
members of different species.
C. A factor in the ecosystem that targets one specific
species and greatly reduces their numbers.

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