Cover Credit: CHRISTOPHER MORRIS/VII FOR TIME, ALEXEY DRUZININ/AFP/GETTY, MOISES SAMAN/NYT, BILL CARTER/DEMOTIX, NASA/JPL, PETER VAN AGTMAEL/MAGNUM/NYT, CALLIE SHELL/AURORA FOR TIME, STEVEN DAY/AP, ARIANA LINDQUIST FOR TIME, LYNSEY ADDARIO/VII NETWORK, KATE WESTAWAY, TOM SCHIERLITZ FOR TIME, BRIGITTE LACOMBE FOR TIME