I like this idea because it fits with finding them in coin hoards and it seems practical - a simpler way for a merchant to check the value of coins without a scale and set of precision weights.
DARPA in particular has invested in several projects to try to develop a synthetic blood alternative. There’s no chance anytime soon of reproducing all of the functionality of real blood. The research is mostly targeting something that could be transfused in an emergency that could keep someone alive while they’re transported to a care facility (maintain pressure and distribute some oxygen without inducing toxicity), especially something that would be field-deployable with a longer shelf life, preferably without refrigeration.
other toys (lemmy.world)
TELL ME YOUR SECRETS (lemmy.world)
Hella unlikely they were used to knit gloves
Blood donations have fallen to catastrophic levels. Experts say young people need to step up. (www.nbcnews.com)