alleryScientific spaceflight began in which decade?
A1920s
B1950s
C1900s
D1990s
Answer & Solution
Correct answer: B. 1950s
1. Spaceflight grew rapidly from the 1950s to the 1970s.
2. Scientific spaceflight began in the 1950s.
3. The 1900s and 1920s are too early.
_Source: Wikipedia, Transport: Mechanical_
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