Answer:
The common housefly is a flying insect that is found throughout the world. The genus and species of the housefly is Musca domestica.
Anatomy: Like all insects, the housefly has a body divided into three parts (head, thorax, and abdomen), a hard exoskeleton, and six jointed legs. Flies also have a pair of transparent wings. The Housefly can taste using its its feet and with its mouthparts.
The information found by Lewis and Clark showed many new places to settle, what the new land was like, and what could be accomplished in those areas. They found more land to farm and build homes. They also found some of the major rivers and landmarks of today.
New uses for medicine were discovered would be your answer.
After World war 2, most part of Europe was destroyed, both physically and economically. And US help Europe with Marshall plan and Truman Doctrine.