Wow. Good guess. I got that one because when I was a kid, you used to be able to buy these little plastic dinosaurs at I think it was Ben Franklin for a dime each, or something like that.
I did guess at the heaviest noble gas question, but I had remembered that it’s the heaviest elements that are radioactive, and they blame lung cancer on this element, so I got that right.
Paleolithic and Pleistocene was another I was unsure but the phrasing of the question itself is the clue to the answer.
There was a fair bit of guessing in this quiz on my part and I suppose on the parts of several others as well. However, the fact remains that I’m happily intimidated that most of the respondents here did better than I did. I have always known that I was in good company here.