Some technologies are simple and use common materials - the digging stick being a prime example, since it can be made out of a wooden stick (common material) by a single person with basic tools (simple, doesn't need a complex society or lots of complex work done). At the other end, we have modern el...
Lo, we already know how to make sawdust into cattle feed. The downside, of course, is that cows aren't rapid breeders. I think we'd have to pre-digest cellulose and use it as fish feed, or maybe rabbit and chicken feed. Broiler chickens reach slaughter size within 6 weeks, but they take 16 weeks to...
I have that book. Cows can digest cellulose. Perhaps their stomachs would have the bacteria we need to pre-digest woodchips to make them edible by ruminants? Of course we'd have to act fast, before they all get slaughtered for their meat... the feed conversion ratio for meat is a lot worse than for ...
http://www.cavemanchemistry.com/ I'll have to buy this book. I don't know if it includes Sulphuric Acid, but I learned recently that there *is* a way to produce it using Gypsum and clay - roasted together they give off Sulphur Trioxide, which is dissolved in Sulphuric Acid to produce Oleum, which i...
https://en.wikipedia.org/wiki/Pharmacopoeia https://en.wikipedia.org/wiki/WHO_Model_List_of_Essential_Medicines What I've had in mind (for at least five years...) is a book that would contain a list of essential medicines, as well as the plants that contain precursor chemicals, how to extract them,...
What would be the best plastic to use? Supposedly PET doesn't degrade at all. Could a library filled with books made of such material still be usable after a few thousand years? Plastic is cheap, as well. We could easily afford to have thousands of caches all around the world. Millions, even, depend...