How fast can the Earth rotate and support life? In prehistoric times, dinosaurs were so massive that archeologists wonder how they were not crushed under their own weight. Could a faster spinning Earth allow larger animals to exist? Could the slowing of Earth's rotation cause extinction among the larger animals but not the smaller animals? https://physics.stackexchange.com/questions/278117/how-fast-can-the-earth-spin-and-support-life *Ignoring any environmental impacts