This eschaton is a bit different than the previous ones, in that it has more in common with the recent anti-vaccine malarkey than it does with the religious apocalypse scenarios I’ve explored previously.
In the late 1800s, astronomers performing spectral analysis on comet tails revealed that the tail of Haley’s comet contains hydrogen cyanide. Since the Earth periodically passes through the tail of Haley’s comet, and would next do so in 1910, newspapers did the responsible thing and claimed that the world would soon be drenched in deadly cyanide gas. The story soon grew into a full-on end-of-the-world panic, with a run on anti-cyanide pills (often fraudulent) that Carl Sagan famously took on his show “Cosmos.”
Since then, a few things have happened.