Long before Newton discovered his Gravity Theory, Aristotle had made a theory about this. This theory has actually been proven wrong by Galileo in the late 16th century when he dropped several objects (from light to heavy) from the top of the Tower of Pisa. Galileo found that no matter how heavy or light the object was, the fall time was the same. In the 17th century, Isaac Newton also described that the fall of an object is due to gravity and there is no correlation with the size or weight of the object. Besides that, there are still some theories that are declared wrong. You can see on mcgill university.
– The hottest temperature of the human body is the head
Many people argue that the “hottest” temperature of the human body is the head. This is because the head has the most circulatory nerves. But this fact is really very wrong. In fact, all parts of the human body have the same temperature. This can be proven by doing a simple experiment with a thermometer. Wherever the thermometer is placed, the temperature produced will always be the same.
– Each part of the tongue detects a different taste
The theory that each part of the tongue detects different flavors was introduced by Auguste Escoffier, living in the 19th century. This theory was actually broken by Kikunae Ikeda, a Japanese chemist in the early 20th century who discovered that the tongue contained glutamic acid which was able to detect taste. Because that doesn’t matter where you put the food on the tongue, it will be the same in all parts. Kikunae Ikeda’s findings were not accepted until the end of the 20th century when scientists examined Ikeda’s own theories and proved themselves that Ikeda’s theory was correct.
– Chameleons change skin color to disguise
To avoid enemies, chameleons are believed to always change the color of their skin, to resemble the color of plants around. This theory is actually not wrong. Indeed, changing the color of the skin to be the same as the environment is one of the “weapons” of chameleons. But more in-depth research shows that chameleon skin color changes do not always resemble the environment. Chameleon skin contains chromatophores which can change, and this change depends on the mood or feeling of the chameleon.