What we know about early childhood and screens, including a surprising argument for introducing tech at a tender age. This episode was produced by Miles Bryan, edited by Megan Cunnane, fact-checked by Melissa Hirsch, engineered by Adriene Lilly and Patrick Boyd, and hosted by Jonquilyn Hill. Photo by CHARLY TRIBALLEAU/AFP via Getty Images. You can find Dr. Jenny Radesky and her colleagues’ tool…