Science

by Michael Grunwald

by TIME Photo

by Michael D. Lemonick

by Dan Kedmey

by Adam Glanzman

by Sam Frizell

by Alex Fitzpatrick and TIME Photo

by TIME Photo

by Rishi Iyengar

by Jack Linshi

by TIME Photo

by Arpita Aneja

by Alex Fitzpatrick

by Nolan Feeney

by Jeffrey Kluger