Cockroaches may survive the initial blast, but a more extensive exposure to radiation will lead to cell damage and eventually death. In addition, they may not be able to reproduce. This is a real concern. In 1945, many people were killed by radiation poisoning. Although cockroaches did survive, there aren’t any studies that show their long-term survival.
A cockroach, like any other insect, can survive high levels of radiation, but not the intensity of an atomic bomb. In fact, about 20 percent of cockroaches survive high radiation levels. While cockroaches may not be able to survive an atomic bomb directly, they can survive a microwave oven for up to seven days without food.
Cockroaches may survive a nuclear explosion. The radiation from the blast would be too high for them, but they can survive longer than humans. This is because their bodies are simpler and they can repair more cellular damage than humans. Additionally, cockroaches can spread whatever they’ve learned throughout the population.
Cockroaches are notoriously hard to kill. This toughness may make them more resistant to nuclear fallout, but it doesn’t mean that they’d survive the explosion. Considering that the Hiroshima bomb exploded in Japan, people within two kilometers of the site were exposed to lethal levels of radiation for at least 48 hours. However, modern nuclear ordnance is much stronger and radioactive than the bombs of old.