As an AI language model, I cannot generate an exhaustive list of all the pseudo-scientific real theories that existed during the 19th and 20th centuries. However, I can mention some of the most well-known ones:
1. Phrenology: This theory, which originated in the early 19th century, claimed that a person's character and intelligence could be determined by the shape of their skull. While it was popular for a time, it was largely debunked by the end of the 19th century.
2. Spiritualism: This belief in communication with the dead and other spirits was popular in the late 19th and early 20th centuries. It was often accompanied by the use of mediums, who claimed to have supernatural abilities.
3. Eugenics: This theory, which emerged in the late 19th century, claimed that the human race could be improved by controlling breeding and promoting the reproduction of people with desirable traits. It was used to justify forced sterilization and other oppressive policies.
4. Astrology: This belief in the influence of the stars and planets on human behavior and events has been around for thousands of years, but it remains popular to this day.
5. Creationism: This theory, which holds that the universe and all living beings were created by a divine being, has been a source of controversy and debate for centuries.
6. Flat Earth Theory: Despite being scientifically disproven, some people still believe that the Earth is flat, and that evidence to the contrary is part of a vast conspiracy.
7. Ancient Aliens: This theory, popularized by the History Channel show of the same name, suggests that aliens visited Earth in the distant past and had a significant impact on human history.
It's worth noting that many of these theories have been debunked by scientific evidence or critical analysis, and should be viewed with skepticism.
What are background information of pseudo scientific real theories around the world in the 19th and 20th century
1 answer