We used to trust the scientists. We refer to them when we want to give greater weight to his own words, quote them, involve as experts. But they are only human and can make mistakes, too. Even great.
In the Middle Ages the idea of turning lead into gold does not seem so crazy as it is today. This is easily explained. The first experiments in chemistry were more than promising - mixed in a certain way the substance changes color sparkled exploded disappears, grew, shrank, exuded unusual smells ...
The conclusion is clear - why not dull gray metal to become a shining yellow? So began the search for a reagent capable to make such a transformation - the mythical "Philosopher's Stone».
Parallel searches were "elixir of life", which also remained a dream.
Phlogiston - it is such a "fiery substance" that in 1667 "discovered" by Johann Becher. Scientists believe that the substance contained in all combustible substances and disappears when they are burning.
Many scientists buy into the arguments and Becher tried using the phlogiston theory to explain some of the phenomena associated with fire and burning. For example, they believed that the flame is extinguished, when all the phlogiston released; that the air required for combustion because it absorbs flogiston; as we breathe, to rid the body of the same phlogiston.
The theory of phlogiston had lasted until the end of the 18th century, there is no oxygen theory of combustion.
3. "Rain follows the plow"
Now it seems incredible, but once among Americans and Australians was very popular theory that if hard enough and long to cultivate the land, it is certainly going to rain.
This idea has not been questioned, because ... confirmed. No, of course, the plow does not cause any rain. However, in some regions (such as the American West, for example) for a long period of drought will certainly follow the rainy season. And if for a long time to go to the plow on the field, then sooner or later there comes a change cycles.
4. Earth the entire 6000 let