When did Robert koch make microscope?

Is bush family related to Alexander the great? The philosophes influenced Catherine the Great's? What are the birth and death dates of Lucius Cassius Longinus? What was Ben Franklin's area of expertise? How did Cyrus the great react or changed after these events? What caused people to want to reform government and society in the 1800's? What is the phone number of the Greenburgh Public Library in Elmsford? How are the stuka sirens activated? How many people did Joshua kill? What goes black and white? Which is not a right guaranteed under the Bill of Rights? Where was fascism practiced? What is true about the firebombing of Tokyo? Has South Korea fought the US? Can you see Christopher Columbus sailing from space? What producers live in boreal plains? What is the most authentic way to portray Native American culture during the 1700s in the Northwest did they wear feathered headdresses hunted buffalo and lived in teepees? The bayeux tapestry was designed and made to celebrate and record what? Who poisoned Ivan the terrible? When did the roman army end?