Abnormal posturing is different from bad posture or slouching.. Instead, it involves holding a body position, or moving one or more parts of the body in a certain way. Abnormal posturing may be a sign of certain injuries to the brain or spinal cord.
Follow @TIME. 1963 was a momentous year in America: President John F. Kennedy was assassinated, Martin Luther King Jr. delivered his âI Have a Dreamâ speech at the March on Washington and, somewhat less heralded by all but the most fervent postal historians, the ZIP code was introduced.
Zip codes are actually a much more recent phenomenon than you might believe. In fact, they're only 52 years oldâa concept that was introduced during World War II, and officially implemented in 1963. The zip (Zoning Improvement Plan) code was created when the postal service lost a huge portion of their staff who went to fight in the war.