Peopling the Western Hemisphere

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1.
ADENA
2.
AGRICULTURE
3.
ANASAZI
4.
ARCHAEOLOGIST
5.
ARTIFACT
6.
AZTEC
7.
CIVILIZATION
8.
CULTURE
9.
EMPIRE
10.
GLACIER
11.
HUNTER-GATHERER
12.
INCA
13.
IRRIGATION
14.
MAIZE
15.
MAYA
16.
MIGRATE
17.
NOMAD
18.
PUEBLO
19.
SPECIALIZE
20.
SURPLUS