Incentives, because they are forced to work, most likely they are not enjoying the job so they are not getting any good incentives.
Two that I know of are a sextant, and maybe an astrolabe
Over 200 days.
The Atlantic Coastal Plain of North America has a generally warmer climate, allowing for the growing season to be longer than normal.
Hope this helps!
Mountains support Wegeners idea by how he saw that the same species on one mountain was the same on a different one thus causing him to believe that the earth is forming or making mountains in some way.
