Jonas Salk<span> </span><span>was an American </span>medical researcher<span> and </span>virologist<span>. He discovered and developed one of the first successful </span>polio vaccines in the 1950's.
Hope I helped. :)
Answer The French and Native Americans vs. The British and the Native Americans
In 1917, Germany attacked some passengers in submarines from the US that led the US to assist in WW1. Hope this helps!
<span>They limited the amount of gold available for trade, increasing its value.</span>
William Penn was relatively nicer than any other group of settlers. He actually bought land from Indians instead of stealing the land. He respected Indians and didn't believe in enslaving them. He would also sign peace treaties with nearby tribes.
