A stupid game, I know; and I apologize in avance. But hopefully it will be fun/entertaining/wildly humorous/intellectually stimulating.
Take a modern machine/program/tool/device and put it back in time, as far back as you want. How would it be used? What would it be called? What impact would it have? (these are only suggested questions to ask yourself, answer one or all or a question not even listed).
After you explain how the machine from the post above you would work or what it would be called or whatever, leave a device/tool/program/machine for the next person. You can put whatever it is in any time period and location you like (but obviously not one where it would already exise).
For instance, Photoshop... It would be called Photoshoppe and King Henry VIII wouldn't look nearly as obese in his portraits.
Pepper spray, known as bear scare to cavemen, kept hungry visitors away from the cave. Once empty, the shiny metal cans became cult objects. The clan's shaman's fingers would therefore always smell of pepper, and his touch would make little children cry.
Used by the ancient Egyptians as hair powder until one day it rained...then they figured out it made a damn fine paste. It never did dawn on them that you could eat the stuff. Oh well.
Next: A 10 inch diameter sphere of 85% of highly enriched uranium...just a bit too small to achieve critical mass.
Plime is an editable wiki community where users can add and edit weird and interesting links. Users earn karma when other users vote on their actions. The more karma you have, the more power you have at Plime.
Spray paint was used in medieval times to lure rattle snakes out of hiding. Users depressed the top button, releasing the "snake spirit" which would take the form of a colorful cloud and would speak in snake-voice, calling all nearby snakes to come out of hiding. It is a common misconception that the Pied Piper used a flute. In truth, he used one of these Snak-B-Gon vessels.
Back in the 80's it was known as the "tape-less Walkman" Everyone who was someone had one. It wasn't until the advent of CD's and modern computer techniques that any music was listened to on them.
PS3 was created in medieval Japan by a powerful sorcerer and given to the Emperor as a present. At first he felt it was awkwardly shaped and resembled an ebony George Foreman Grill. He was also disappointed at the lack of cool games. But the more patient he was with it, the greater the rewards he reaped. He forced the samurai out of business and merged them into the powerful and feared workforce known to the west as "Sony".
The Microwave as we know it now was originally used to euthanize small animals at the turn of the century, becoming very popular in the deep south prior to the days of roadkill. Larger models were tried for criminals but they couldn't get rid of the smell.
Having no power source in the 1430's, the laptop battery lasted close to an hour before ultimately shutting down and becoming completely useless. For the next twenty years the laptop was used as a paperwieght and a doorstop. It wasn't until 1456 that someone discovered it's usefullness as a folder.
Duct Tape originated in south america. it was mostly used to bind and gag prisoners, hostages, and rape victims. Until modern times where it is now used to bind prisoners, hostages, and rape victims due to its strength and versatility.
Used by Ducks, when ducknapping. The original name Duck was later mispelled on a label as Duct and since its stuck, pun intended. EDIT:lol f**k too slow
Cars, the dvd is used to steady wobbly tables and chairs. there is no other apparent uses for this movie.
This? Why this is clearly a round-footed whitebird, displaying its prominent tail feather for the purposes of mating. It flies to the edge of the earth to lay its eggs, which can be seen every spring.
Easy! Medieval woodcuts illustrate the use of the this device as a Black Plague prevention face mask. Even prior to germ theory, Medieval physicians knew that the Plague could not be contracted if the eye openings in the mask were down by the chin, exposing only the neck, where there are no anatomical orifices.
Not having electricity the peoples of pre industrial revolution London could only think to use the light bulb as a means to identify thieves and liars. Rather than be so rude as to directly accuse someone of such an act a person would pull out a light bulb and smash it upon the ground loudly.
In medieval France the playing card or "Espirit-Carte" as it was then called, was used in the important task of deciding whether someone was a witch and the subsequent decision of whether indeed to "Burn her!".
People soon got bored of using the plain cards and added pictures to the cards and these became known as Tarot-Cards. It wasn't until sometime later when a man named Adolphe Merde re-marketed the Esprit-carte for use as a playing card with which to play a large variety games and lose vast amounts of money with.
The Locomotives Act 1865, amongst other things, stipulated that all cars must have a man carrying a red flag walk 60 yards in front of the car.
In 1893, Karl Benz released a version of his Motorwagen which had Sat-Nav fitted. In the absence of a geostationary satellite network from which to get a fix, it instead relied on the man with the flag knowing where he was going.