All molecular motion stops at Absolute Zero, or zero degrees Kelvin. That is equal to -273 degrees Celsius
This is incorrect. Particles never stop moving around - even at absolute zero. The uncertainty principle states that you can never know a particles position and momentum. Therefore if a particle stopped moving at absolute zero, you would know both and this would break the principle. As a result the particle still moving about to obey this principle - even at absolute zero.
Actually, both answers are both right and wrong. Absolute zero would be the point that all particles would stop moving. However, scientists have not been able to reach absolute zero- they have come close, but not close enough. So, no known particles have ever stopped vibrating in place.