Mop Top the Hip Hop Scientist Celebrates African-Americans in the Sciences
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Ben Carson
George Washington Carver
Bessie Coleman
Charles Drew
Marc Hannah
Euphemia Haynes
Mae Jemison
Katherine Johnson
Lonnie Johnson
Earl Lucas
Elijah McKoy
Garrett Morgan
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blood trans·fu·sion - the transfer or act of removing blood or blood elements from one person who is called the donor into the bloodstream of another person who is called the recepient.