Roach Facts!

Run for Your Lives! The world's largest roach (which lives in South America) is six inches long with a one-foot wingspan.

Roaches By the Numbers 6 -- Number of legs on a cockroach 18 -- Number of knees on most cockroaches (at least!) 40-- Number of minutes cockroaches can hold their breath 75 -- Percentage of time that cockroaches spend just resting (how lazy can you get?) 5,000 -- Number of species of cockroaches worldwide 280 million+ -- Years ago that cockroaches are thought to have originated (during the Carboniferous era)
Bad News Some female cockroaches mate once and are pregnant for the rest of their lives (bummer).
The Legend of the Headless Cockroach A cockroach can live a week without its head. The roach only dies because without a mouth, it can't drink water and dies of thirst.
Wanna Race? Cockroaches can run up to three miles in an hour. (Hey, it's no marathon, but it's not bad.)
Better Check Those Cracks in the Wall Young cockroaches need only a crack as thin as a dime (about .5mm wide) to crawl into. Adult males can squeeze into a space of 1.6mm or the thickness of a quarter. Pregnant females need the most space to hide: 4.5mm or a space as tall as two stacked nickels.
Little Hearts A cockroach heart is nothing but a simple tube with valves. The tube can pump blood backwards and forwards in the insect. The heart can even stop moving without harming the roach.
If these facts aren't enough to satisfy you (you must really want to impress your friends)