Sports medicine doctors treat athletes and other performers who may suffer injuries through physical activity. The educational requirements for becoming a sports medicine doctor include extensive graduate schooling.
Ground Zero originated as a term to describe the site of a nuclear explosion and later was used to refer to the point of any dramatic or violent event. 1  Remembrance: A view of the World Trade Center North Tower memorial pool at the National September 11 Memorial and Museum in New York today.
Zero-point energy (ZPE) or ground state energy is the lowest possible energy that a quantum mechanical system may have, i.e. it is the energy of the system's ground state.