harrystyles
What if oxygen is poisonous and it just takes 75-100 years to kill us?
hair-old-styles
My science teacher said he thinks that's true actually
thepiodern
Yeah this is actually pretty much what is going on. It's why anti-oxidants are such a big deal. Bonus fact: oxygen oxidizes stuff in your cells or, in other words, it's not toxic, just setting you in fire very slowly.
broliloquy
What if there are aliens out there but they subsist on entirely different substances and they're just scared as shit of us and our crazy ass hell planet? Once in a while some alien anthropologist type suggests checking out the on this inhabited planet out towards the galaxy's edge. The other aliens just look at the naive academic with horror. No!! We do not go to that world. That is where DEATH BREATHERS live. They recreationally consume poisons and are more or less composed of biological fire. Their atmosphere is made of rocket fuel. We must leave the DEATH BREATHERS in peace. Do not go there. Do not.
paradisemantis
I am so fucking inspired.
Jensen-is-the-vessel
Death Breather
I can't seem to find it now, but there is a story out there that earth is considered a lethal planet and the wider alien universe considered it unable to support life, or something like that. It was kind of a "never ending" book as it was constantly being added to.
https://deathworlders.com/
That's it! I got pretty far into it. Such a great story