Yes they have.
Think about all the man made objects we sent into space.
Not technically structures.
What?
Yes, they are.
Rockets, satellites, nuclear blasts that result in gas being whipped away in the upper atmosphere.
Yes they have.
Think about all the man made objects we sent into space.
Not technically structures.
What?
Yes, they are.
Rockets, satellites, nuclear blasts that result in gas being whipped away in the upper atmosphere.