Science

by Helen Regan

by TIME Staff

by Daniel D'Addario

by Daniel D'Addario

by Daniel D'Addario

by Jeffrey Kluger

by Jeffrey Kluger

by Charlotte Alter

by Rachel Janik

by Jeffrey Kluger

by Dan Kedmey

by Jack Linshi

by Tessa Berenson Rogers

by Jeffrey Kluger

by Josh Sanburn