Answer:
6000 years ago
We believe Sumerian civilization first took form in southern Mesopotamia around 4000 BCE—or 6000 years ago—which would make it the first urban civilization in the region. Mesopotamians are noted for developing one of the first written scripts around 3000 BCE: wedge-shaped marks pressed into clay tablets.
In 1776, America declared independence from Britain. Five years later the congress ratified the first national constitution.
Answer:
If 19th-century science is defined by certainty, the experiments with advanced technology and the scientific studies would have been the poof of certainty.
19th century was a period when many ideas, theories and inventions were developing. This era was also known as a modern era of science. The result of the discovering and experimenting would have been recorded in the Journal, some of them still exist. So, there wouldn't have been any loss, whatever the scientists were putting forward were seen in the public. Some of the examples are the Steam Engine, Charles Darwin Theories, telegraph and telephone, medicines.
The most active period of the Trans Atlantic slave trade was during the period between the years 1501 to 1867. The Atlantic slave trade or Trans Atlantic Slave Trade became very popular between the 15th and the 19th century. Most of the slaves were captured and taken to the New World. The transport of slave trade took place via the Triangular Trade route.
