The University of Utah's Genetic Science Learning Center created this zoomable window that compares the size of a coffee bean with smaller things like a grain of salt, a paramecium, a red blood cell, a human egg, a glucose molecule, and so on, all the way down to a carbon atom.
Mark Frauenfelder is the founder of Boing Boing and the founding editor-in-chief of MAKE. He is editor-in-chief of Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects