You know you're a history fan when you still get upset thinking about the library of Alexandria. Can you just imagine the wealth of knowldge that was in it? Not necessarily a history fan but a lover of literature.
Emiliania huxleyi - single-celled marine phytoplankton that produce calcium carbonate scales (coccoliths). A scanning electron micrograph of a single coccolithophore cell. Taylor (University of North Carolina Wilmington Microscopy Facility)