Researchers found a sudden increase in teens' symptoms of depression, suicide risk factors and suicide rates in 2012 — around the time when smartphones became popular, researcher Jean Twenge says.
Thomas Trutschel/Photothek via Getty Images
The teen protagonist in John Green's latest novel, Turtles All The Way Down, has a type of anxiety disorder that sends her into fearful "thought spirals" of bacterial infection and death.
Researchers aren't sure why strong relationships in adolescence seem to pay dividends later in life, but one hypothesis is that those bonds act as a buffer against depression and insults.
Maria Fabrizio for NPR