What was the most notable about christopher copernicus's work?

How does the existence of a site like catus hill demonstrate the challenge that archaeologist face when making theories?

17 million negroes cannot do as you suggest qnd wait for the hearts of men to change. tjis we cannot do unless we persue aggressively goals which all other americans achieved ove 150 years ago. how might martin luther king jr. respond to this statement?

In what african country did a terrorist attack on civilians lead to the evacuation of hundreds from a targeted hotel complex?