In ancient Chinese agriculture of the third century B.C., the iron plow was invented to make it easier to work the soil. These were called "kuan" or moldboard plows and were eventually pulled by oxen.Continue Reading
During the Zhou period, there were improved iron casting techniques leading to its use in creating tools and weapons. By 400 B.C., iron was prominent in agriculture. The Chinese grew soybeans and rice in rows, which were more effective by plowing. The plows were shaped like a "V" with a sharp point and side wings to cut and move the soil. At first, these plows were pushed by cultivators; however, by the first century B.C., cattle were used to pull them more quickly.
In the Western world, Jethro Wood became the first to patent the iron plow in 1819. This plow was made of interchangeable parts and was an important development in farming technology.Learn more about Inventions
The first inventor who used the plow in 6,000 BC, when animal power was harnessed by man, is not credited in modern sources. There are early references to the plow in the Bible. Chinese used the Moldboard plow by 100 BC. Virgil writes of the plow in 1 AD.Full Answer >
The custom of wearing wedding rings on the left hand originated in the third century B.C. in Greece. Physicians of that time incorrectly believed that a vein in the third finger of the left hand ran directly into the heart. Therefore, it made compelling sense that this body part should be chosen to bear a symbol of eternal love. The vein was known as "Vena Amoris," the "Vein of Love."Full Answer >
Scientists believe iron was first discovered in Egypt. Iron has been found in many ruins across the ages, ranging from as far apart as Mesopotamia and the western Roman Empire, but the oldest iron relics were found in Egypt and date from around the year 5000 BC.Full Answer >
Scientists predict that robotics will play a role in the future in fields such as elder care, surgery, manufacturing and agriculture. Some also speculate that robots' intellectual capabilities may grow and that artificial life forms may interact with people in daily life, creating ethical dilemmas and further stressing resources.Full Answer >