Sobel establishes the rule that exact knowledge of the hour in two places at once is
necessary to navigate with accuracy. However, due to mechanical problems, it was
impossible to know the exact time on board ships up to and including the use of
pendulum clocks. Therefore, all captains in the Age of Exploration must have spent
a great deal of time lost at sea. What kind of reasoning leads Söbel to reach this -
conclusion?
.

the answer is something i don't know

the audience knows that nora is intentionally failing to dance correctly, but helmer doesnt

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.