Science

by Mia Tramz

by Corey Protin and Bryan Walsh

by TIME Staff

by Michael D. Lemonick

by Bryan Walsh

by Alexandra Andersson

by Hannah Goldberg

by Markham Heid

by Jeffrey Kluger

by Aryn Baker

by TIME Photo

by NBC News

by Jeffrey Kluger

by Buzz Aldrin

by Michael Grunwald