Science

by Tanya Basu

by Justin Worland

by Tanya Basu

by Olivier Laurent

by Sarah Begley

by Justin Worland

by Alexandra Sifferlin and Heather Jones

by Victor Luckerson

by Justin Worland

by Maya Rhodan

by Ryan Daly / Fortune

by Justin Worland

by Benjamin Snyder/Fortune

by Dan Kedmey

by TIME Photo