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Answer:
Maikang Its time has come. The cost over ride the benefits. Yes, I grew up watching the space program from infancy to maturity, over 50 years. However, there just is not a clear future for space exploration. The Mars mission is fantasy. Humans just cant survive in space that long. It would more than likely be a suicide mission.skin analyzer

Maikang We created a whole new branch of medicine called ‘space medicine’, to study how people (and animals and plants) did in zero gravity. We found that spending more than a day or two in space starts changing your body. You lose calcium from your bones and your muscles begin to deteriorate. Back in the 1960s I remember reading that we’d spent millions of dollars figuring out what kinds of exercises astronauts could do in space to keep their bodies fit. All astronauts that spend more than a few days in zero-G need some time to recuperate once they get back.

There have been many experiments in growing bacteria cultures and plants to see how they do in zero G. There are processes that could lead to better drugs, stuff like that. But no earth-shattering discoveries that I’ve heard about.skin analyzer