Why did the Vikings die out in Greenland?
a. They overpopulated the island.
b. They underpopulated the island.
c. They believed in human exemptionalism.
d. They left the island to move to Norway.
Question 2
The doughnut hole in Medicare refers to ________.
a. a new, freestanding prescription drug plan that will be formulated under the new healthcare law.
b. drug coverage obtained by individuals with an extremely low income and no personal wealth,
c. the cost of drug expenditures that surpasses the federal subsidy received by retirees aged over 65 years who are more than 14,664.
d. none of the above
Cave on Flores Island where the specimens were discovered
Transient killer whales near Unimak Island, eastern Aleutian Islands, Alaska