Because humans have a need to reach space, and there is no other way to reach space. Reaching space has many benefits, including communication, navigation, mapping and exploration. New space crafts are constantly being invented because new technology allows for safer and more efficient space crafts.
NASA has sent a total of 5 space crafts to mars.
No
It is reusable whereas most other spacecraft isn't.
Saturn was discovered by ancient Greeks and Romans, so sorry no space crafts.
No
suck it
Docking
You build space craft in order to get to and travel round in space.
site for launching space crafts
non
1