Question

Scientists estimate that mars............by the end of this millennium

Answer 1

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The first attempts to reach Mars happened near the dawn of space exploration. Considering that the first satellite, the Soviet Union's Sputnik, launched in 1957, it is extraordinary that only three years later the Soviet Union space program looked to extend its reach to Mars.

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Answer 2

Answer:

the first attempts to reach Mars happened near the dawn of space exploration. Considering that the first satellite, the Soviet Union's Sputnik, launched in 1957, it is extraordinary that only three years later the Soviet Union space program looked to extend its reach to Mars.

Explanation: