Science

by Stephanie Burnett

by TIME Video

by Michael D. Lemonick

by Michael D. Lemonick

by Mirren Gidda

by Melissa Hellmann

by Nash Jenkins

by Ben Banks

by Sarah Begley

by Alexandra Sifferlin

by Michael D. Lemonick

by Markham Heid

by Melissa Hellmann

by Alexandra Sifferlin

by Dan Kedmey