What contribution to modern science was made by andreas vesalius? a) he created a vaccination that reduce the death rate across europe in the 16th century. b) he published on the structure of the human body which became the foundation of modern anatomy. c) he is considered to be the founder of physiology due to his extensive research on circulation. d) he wrote public letters condemning the church for its non-acceptance of early scientific thought.

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.