Malaria
Dr. John Gorrie practiced medicine in Florida. He experimented with ways to prevent the spread of malaria. The summer of 1841 was a particularly bad summer for malaria infection. People had not yet realized that malaria was spread by mosquitoes. (That discovery didn't occur till the 1890s.) Dr. Gorrie, noting that malaria was unlikely to occur in colder climates, thought that perhaps cooling the air in the sick rooms of his patients could help them. He started with the idea of using a fan to blow air across a bucket of ice. A rudimentary beginning to air cooling and refrigeration ... but as they say, the rest is history!
The two factors that contributed to the post war economic boom were
1. Era of teenagers: As there was a baby boom the children grew up to be teenagers who had the power of money
2.The discovery of plastic : its discovery made everything cheaper and excited people to buy more stuff
Answer:
Just a couple of decade, until 294 BC
Explanation:
Soon after the death of Alexander the Great, his generals started dividing his legacy. The strongest among them created their own dynasties.
The Kingdom of Macedon was created in 294 BC and with shorter interruption lasted until 168 BC. It wasn't a strong and rich empire, but it was unified and military advanced.
Ptolemy created his own Ptolemaic kingdom on the soil of Egypt in 305 BC and it lasted until 30 BC. It was the wealthiest among all Hellenistic states.
The Seleucid Kingdom covered the area of Persia and was military the strongest among all Hellenistic states.
