Teenagers are stereotypically known for texting endlessly, but new evidence shows that they are also using their smartphones to download lots of apps and watch YouTube videos continuously as well. According to a new study from Pew Research Center, called "Teens and Technology 2013," 78 percent of U.S. teens now have a cell phone, and almost half (47 percent) of them own smartphones. That translates into 37 percent of all teens owning smartphones, up significantly from 23 percent in 2011. According to Pew, the figure for smartphone ownership increases to 44 percent for teens aged 14 to 17, which is closer to overall U.S. adult adoption rates of smartphones. Article