Cockroaches will not rule the world after a nuclear war
Once a week, the "Checking the Myth" column examines famous historical distortions, their origins, and their lasting impact. This week: we debunk the claim that the maligned insect is destined to survive a nuclear apocalypse.
In the spirit of recent global tensions, imagine for a moment the following apocalyptic scene: radioactive mushroom clouds settle slowly, entire cities turn to ash, and the world we know ceases to exist. In such a dystopia, what creature do you think will emerge from the burning ruins, moving its antennae and scurrying about? You probably answered a cockroach.
The assertion that "only cockroaches will survive a nuclear war" has become a familiar cliché in popular culture. After all, if we barely manage to deal with them with pesticides, why wouldn't they survive the end of the world? However, it turns out to be a myth, rooted in a combination of partial facts, historical fear, propaganda, and irony.
Let's start with the facts: a nuclear explosion produces a massive shock wave and heat reaching thousands of degrees Celsius at the point of impact, so within the close radius of the explosion, not even the toughest cockroach would survive, nor would any other form of organic life. But what about radiation at longer ranges? Here, there is a grain of truth. Certain species of insects, including cockroaches, are indeed more resistant to radiation than mammals, partly due to differences in cell division cycles and DNA repair mechanisms. Studies have shown that cockroaches can survive radiation doses several times higher than the lethal dose for humans, although there are other insects far more resistant than them.
However, the myth usually concerns not just one bomb, but a large-scale global war. In such a scenario, the Earth would sink into a "nuclear winter" where soot particles and fallout would block sunlight, causing temperatures to drop significantly. Cockroaches are cold-blooded creatures dependent on ambient temperature, and many species rely on human food waste. Therefore, in a colder, resource-poor, and ecologically disturbed world, cockroaches would not thrive in a radioactive wasteland, and many would not survive at all.
What is the source of the myth? Its roots appear to trace back to Japan in 1945. After the atomic bombs were dropped on Hiroshima and Nagasaki (this week marked the 81st anniversary), reports emerged of insects, including cockroaches, seen scurrying among the ruins.
In the 1960s, at the height of the Cold War and anxiety over doomsday weapons, the idea took on a life of its own when cultural figures illustrated the absurdity of the nuclear arms race with an image in which humanity would destroy itself, while the most maligned insect would survive. It was an image too sharp and ironic not to spread as a cultural icon.
In conclusion, cockroaches do not possess a secret protective suit, and they are not going to inherit the Earth. They have a certain resistance to extreme conditions, but they are far from immune to a global nuclear war, in which they would also be severely affected. Let's hope we never have to know for sure.
