How do we know that vasco da gama was not an expert at sailing in the indian ocean?

What is the most celebrated piece of japanese literature and who was its author? why is it important in the literary world? (around 1000 ad by a woman)

After the 9/11 attacks, the united states launched a military offensive against the taliban government in a) iraq b) egypt c) afghanistan d) kuwait

Consider the events in alfred wegener's life that led to his development of the continental drift hypothesis. review the items below and determine whether each item is (1) an observation that led alfred wegener to develop his continental drift hypothesis, or (2) evidence wegener gathered to support his proposal.