50. Fertile Crescent: the land between the Tigris and Euphrates and to the west.
51. quarter: 1/4 ; 0.25
52. Narrow: thin; skinny
53. squeezed: to fit into a small place
54. cargo: things in a ship or plane
55. sailor: a person who travels on a ship
56. search: looking for
57. founded: started
58. sailed: travel by a ship or boat
59. colonies: a country that is invaded by another country.
60. Navigate: to sail a ship or drive a car
61. Settle: live
