By James Vlahos

By PopSci Editors

By Sophie Bushwick

By Eric Adams

By Cliff Ransom

By Amy Shira Teitel

By Mary Beth Griggs

By Katie Peek

By Francie Diep

By Jennifer Bogo

By Dave Mosher

By Sarah Fecht

By Zach Zorich

By PopSci Editors

By Nick McGill, as told to Flora Lichtman

By Lillian Steenblik Hwang

By Joey Carmichael

By Julie Beck

By Clay Dillow

By Rena Marie Pacella