There also have been time periods that seemed to have been hotter than the present in spite of CO2 levels being lower than they are currently. Overall what I am saying is that we have had the medieval warm period and the little ice age. Because of these evolutions there has been ...
APUSH review by Adam Norris— a YouTube channel about, you guessed it, reviewing AP US History. He also has videos on AP Government. The Podcast History of Our World— A podcast series focusing on world history. Most of the current episodes cover ancient history (so, periods 1 and 2 for...