Alan Alda's face perfectly described our delight in watching Brian Greene as he explained string theory to Tina Fey—as clearly as possible, so she could understand it. #WSF17 . . . #TinaFey #AlanAlda #BrianGreene #physics #science #understanding #education #communication #stringtheory #actors #improv #comedy #art #performance #theater #live #funny #fun #learn #learning #discover #explore #scienceisawesome #scienceiscool #sciencerules #goals #heros