See the entire definition of Backbone. Biopsy: The removal of a sample of tissue for examination under a microscope to check for ... Blood clots: Blood that has been converted from a liquid to a solid state. Also called a t... Bone scan: A nuclear medicine technique for creating images of bones on a computer screen ...
Schmidt's study also stopped following the toddlers at age 3; she acknowledges that some cognitive changes may not occur until children are a few years older. TV exposure in babies younger than 2 doesn't do any good, Schmidt and Christakis agree.
The worldâs first television stations first started appearing in America in the late 1920s and early 1930s. The first mechanical TV station was called W3XK and was created by Charles Francis Jenkins (one of the inventors of the mechanical television). That TV station aired its first broadcast on July 2, 1928.