I read a short story at least 18 years ago for an extra credit grade in a physical science class. I'm pretty sure it started with some future person finding a journal of a scientist detailing the demise of civilization due to the second ice age. In it the scientist recounts how they invented some kind of liquid that had a higher freezing point that was also more dense than water and would therefor sink. It was accidentally introduced to the ecosystem and over a number of years basically wiped out humankind. It cause natural bodies of water to freeze from the bottom but then not thaw out completely and over successive winters water sources basically became inaccessible due to this "deep freeze" which killed of wildlife, food sources, etc. I seem to remember the story being a few pages typed and for some reason it is stuck in my head! Does anyone recognize this story?? I would love to find it again!

I read a short story at least 18 years ago for an extra credit grade in a physical science class. I'm pretty sure it started with some future person finding a journal of a scientist detailing the demise of civilization due to the second ice age. In it the scientist recounts how they invented some kind of liquid that had a higher freezing point that was also more dense than water and would therefor sink. It was accidentally introduced to the ecosystem- I think a test tube of it was dropped cleaners just washed it down a drain to the horror of the scientist(s). Over a number of years it basically wiped out humankind. It cause natural bodies of water to freeze from the bottom but then not thaw out completely and over successive winters water sources basically became inaccessible due to this "deep freeze" which killed of wildlife, food sources, etc. I seem to remember the story being a few pages typed and for some reason it is stuck in my head! Does anyone recognize this story?? I would love to find it again!