Key terms are typically words that will come up a lot in a unit or a text. It’s more like a vocabulary related specifically to whatever it is you’re doing. High-use academic words, however, are words that are used a lot in a general academic setting, like a university or an academic journal.
Answer: what is the question?
He meant that if they failed then everything that the world has worked so hard for, to advance and become "smarter" than we once were would all be for nothing. We would enter a new Dark Age. The Dark Ages were an extraordinarily difficult period in the story of humanity. It is estimated that 100 million people died at the hands of war, poverty, and plague. But during this time new ideas and ideals were born and much of the groundwork was laid for the world we know today.
Yes I do agree with you so much hahahahha hahahah hahahaha haha