The teeth can not fall out since they are strongly rooted.
they take there rocket back
The planet is round because in space matter is puled together in a sphere. And gravity is why we don't fall off, (also the atmospheric pressure).
because their were no space
No it can't because it is too small and to close to the sun.
molecular structure
Because if they're too close together they will compete for resources, and ultimately die.
doors that could be pushed out rather than puled to open, Brightly colored exit signs and more working space, better fire suppression system.
An Orthodontist will put rubber bands between the teeth to increase the space there. This may be necessary to get the metal bracket anchors in place. It takes time, but the constant pressure will make them move.
solid because the particles are close together and they have no space to move around ;)
The ones on earth, because there are no plants in outer space, and none on the moon that have been discovered yet.
moon
Maybe, but probalbly not.