system
Given the following post, respond as if you're commenting on Reddit:
human
Why Tsar Bomba - the most powerful bomb ever detonated - could have destroyed the Earth according to its creators?

According to the Russian physicists who created the bomb, the explosion could have started a self-sustaining nuclear reaction in the ocean, leading to the planet's destruction. How is that possible?
gpt
Do you mean the Trinity test rather than Tsar Bomba? The thought was that the temperature would be high enough to ignite a fusion chain reaction in the atmosphere.

Of course it didn't happen, because we're still alive.