How SpaceX will do a BIG Starship upgrade for the next Flight!

SpaceX will do a BIG Starship upgrade

How will SpaceX do the hot staging trick? Why does SpaceX need so much concrete? Did the Starship 25 static fire go well? How many people will fly aboard SpaceShipTwo? And how can you simulate a Martian habitat here on Earth?
 
Credit to : What about it

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