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.
Children aged 2-11 watch over 24 hours of TV per week, while adults aged 35-49 watch more than 33 hours, according to data from Nielsen that suggests TV time increases the older we get. (Andrey Popov/Getty Images/iStockphoto) The average American watches more than five hours of live television every day.