Could the French have possibly had the chance to win the Battle of Sedan(1940)?

We know of several cultures that urbanized in pre-Columbian North America, but most of these cities and cultures have been in the south. In particular, we have the Aztecs and Tenochtitlan, the remains of the Mayan urban culture, and the Incan cities of the Andes, but I find myself at a loss when I try to identify any known cities, if they existed in the region we now call the US and Canada.

Where there any large urban agglomerations that occurred, like say with the Mississipian or Hopewell?

I've been reading about the Nazi's and Unit 731 and while doing so I ran across the Tuskegee experiment, basically from my understanding the government was trying to figure out how to sterilize 'undesirables' without their knowledge or consent. In the 70's it became public that the US government was doing this and I was wondering how the public reacted? The US public still to this day largely ignores the unethical things our government has done, so mainly my curiosity lies in whether the people in the 70's cared or not.

Often in historical media you may see an offended party challenge another to a duel over various matters. Was this truly as prevalent as Hollywood makes it? If so were there universal rules regarding duelling? When did it die out and why?

In Mad Men Season 6 Episode 4: The Flood is the reaction to MLK's assassination accurate?

The men and women of this fictional Madison Avenue react in a manner similar to the reactions to J.F.K.'s assassination. Offices are closed, everyone is shocked and crying, reacting to a unanimous tragedy.

While MLK's assassination is now rightly considered a incredible tragedy, I am curious as to wether this reaction is historically accurate. Especially considering many of the characters portrayed are affluent and white, some of which are alluded to as racist. I wonder if everyone reacted to the news as a shock and tragedy or were some indifferent or even supportive?

I understand later Marxists both in Europe and elsewhere made contributions to Marxist thought that discussed what they saw as the global exploitation of a colonized proletariat by the western Bourgeoisie , but i cant find anything on what Marx himself thought of imperialism and some of its racial facets. Did he say anything about it or was he simply concerned with the worker in industrialized European nations?

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I'm not talking about taste here, I mean bad in the dangerous/unhealthy sense. I've always heard that there was an insane amount of lead in almost everything they (the lower class in urban areas) ate, I've heard that ash or ground bone was put in sugar and flour as a filler to improve profit margins, and I've heard that the majority of meat consumed was rotting and maggot infested. Also, not food related, but I've heard the air pollution was so thick in big cities that you couldn't see to the ends of streets sometimes. So I'm curious, how much of this is accurate and how much is hyperbole?

I am just curious to how people in the renaissance viewed religion. From what I've heard they were humanists, but if so, why did they make so much religious art? First that comes to mind is The Creation of Adam - did they believe mankind came from God?

Edit: Also, any good sources for reading about the renaissance would be much appreciated!

What got them to be driven out to Taiwan?

America is relatively new, and accents fascinate me. Is it possible to trace the evolution of the American accents? I know there's a few different ones.

From what I know Brandenburg is an unfertile stretch of land with no natural barriers. During the war their land was plundered by Swedes, Imperials and other Germans. But then the Great Elector comes along and suddenly they have 20.000 fighting men and are a prized ally, which results in their claims being honoured and even having Poland give away sovereignty over East-Prussia.
What caused this turn-around?

Would I find it gross? Would I chip a tooth trying to eat it? Was it even made from the same species of plant?

I'm by no means anything close to an expert on the Romans, I find them relatively boring actually. But this question popped into mind, knowing that they looked highly on the Macedonian Empire and it's successor kingdoms like the Selucids, Thrace, and Ptolemaic Egypt. The Romans conquered a good chunk of there part of the world, and defeated the Greeks/ Macedonians and their way of way of fighting. Parthia wasn't as large as Persia, and surely the Selucids and Pontus weren't enough to stop those that felled the mighty Carthage and the vicious Gauls.

Every time I read about the early history of Rome I run into their conflicts with other peoples in Italy, and of course that comes to the Samnite wars.

Were the Samnites an urban people like the Greeks to the South of Rome and the Etruscans to the north? Or were we they more scattered and decentralized?

As the title says, what were considered classic, vital, or otherwise noteworthy works in the 1870s in the United States?