Musk says humans can be on Mars in four years. Many laugh, but some see purpose
Briefly

Elon Musk’s bold prediction that humans could not only land on Mars within four years but also establish a self-sustaining city in 20 years spurred considerable debate.
While Musk's estimates may seem overzealous, analysts concur that preparations for regular shuttle flights with SpaceX's next-generation Starship rockets are both realistic and achievable.
Read at www.theguardian.com
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