Do you agree that animals were used in space exploration from the 1940's-1990's? What might the consequences have been if they didn't use the animals during that time?

What made this representation of the virgin mary revolutionary

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers. c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers. d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.

Why did alexander give the soldier who saved the hat band a reward? why did he then order the man's head cut off?