Why might scientists want to compare the new stuff they create to the old stuff they started with?

What does munich’s refer to in the 13 days?

All of the following were weaknesses of the articles of confederation, except: a) the central government was not permitted to regulate state, interstate, or foreign trade. b) the central government was not permitted to borrow money. c) the central government had little ability to regulate money. d) the central government had no ability to tax.

How does the balance of trade look different in the us today vs hot it looked in the 70's