Do solids vibrate?

Question

Does a solid object without an external force applied to it, vibrate? So, it is known that atoms and molecules vibrate in a fixed position in a solid. Does the vibration of those molecules and atoms cause the solid object as whole to vibrate? Or no?

Answer 1

Atoms and molecules vibrate at fixed positions, but the direction and amplitude of the vibration of each atom and molecule is random, so there is no net vibration of the solid object.