What were some of the achievements of the early civilizations of the americas

The Aztecs created a calendar system. The Shuar/Jivaro tribe is the only group in the world who made shrunken heads. The Mayans discovered the number zero, which they used to measure time. etc.

Explanation:

answer-the island had airfields that the u.s. military needed.

beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.