Human: Where can I find out about famous people from the United States who were born in the 1800's? Assistant: 
You could start by looking at a list of famous people from the 1800s. There are many lists available online, such as this one on Wikipedia. You could also search for biographies of famous people from the 1800s and read up on their lives. Additionally, there are many books that have been written about famous people from the 1800s.