Wait, so you're telling me....

...that roaches aren't going to survive a nuclear war? From this Slate.com article:

The cockroach survival myth seems to have originated with the development of the atom bomb. In The Cockroach Papers: A Compendium of History and Lore, journalist Richard Schweid notes that roaches were reported to have survived the blasts at Hiroshima and Nagasaki, leading some to believe that they would inherit the Earth after a nuclear war.

...

But studies over the last half-decade, such as those conducted by the United Nations Scientific Committee on the Effects of Atomic Radiation, have found that these "other insects" are more likely to reign in the age after humans; the cockroach might, in fact, be one of the first bugs to go.

Not the most science heavy article, but definitely a great short read.