Few people, unless they travel with an electron microscope, would ever notice the egg of an Aedes aegypti mosquito. But the insects follow us nearly everywhere we go. Aedes can breed in a teaspoon of water, and their eggs have been found in tin cans, beer bottles, barrels, jugs, flower . . . (Subscription required.)
via The New Yorker http://www.newyorker.com/reporting/2012/07/09/120709fa_fact_specter