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Because migrants have conquered wildernesses developed natural resources and established nations migration has been an important force throughout history.
Because migrants have conquered wildernesses, developed natural resources, and established nations, migration has been an important force throughout history.
Unlike nomads migrants usually settle permanently and adopt the customs of their new home.
Unlike nomads, migrants usually settle permanently and adopt the customs of their new home
Not many early migrating people braved the oceans but the ancient Polynesians crossed the sea to find a new home
Not many early migrating people braved the ocean, but the ancient Polynesians crossed the sea to find a new home
Among the many migrants to the United States the Scandinavians settled in Minnesota Wisconsin and North Dakota.
Among the many migrants to the United States, the Scandinavians settled in Minnesota, Wisconsin, and North Dakota.
Wherever they settled they stayed because they had come to make their homes.
Wherever they settled, they stayed because they had come to make their homes.
Some settlers in the Midwest decided to migrate to the West Coast and made the trip by covered wagon
Some settlers in the Midwest decided to migrate to the West Coast and made the trip by covered wagon. Trick question, no commas needed
When the famous overland mail service was started in 1858 travelers spent nearly three weeks in cramped stagecoaches going from Missouri to California.
When the famous overland mail service was started in 1858, travelers spent nearly three weeks in cramped stagecoaches going from Missouri to California.
They had little sleep and only poor food was available at the stops where the horses were changed along the way.
They had little sleep, and only poor food was available at the stops where the horses were changed along the way.
When in 1860 the pony express began to carry letters in saddlebags on fast ponies the migrants lost one way of travel.
When in 1860 the pony express began to carry letters in saddlebags on fast ponies, the migrants lost one way of travel.
Today in the United States some people migrate to find a better climate but most people migrate to seek better jobs.
Today in the United States, some people migrate to find a better climate, but most people migrate to seek better jobs.
Whales most people assume are nonvocal mammals.
Whales, most people assume, are nonvocal mammals.
But one whale the humpback emits a "song."
But one whale, the humpback, emits a "song."
By "song" is meant a regular sequence of repeated sounds that are organized into patterns like the calls made by birds.
By "song" is meant a regular sequence of repeated sounds that are organized into patterns like the calls made by birds. Trick question, no commas needed
Unlike birdsongs which are high-pitched and last only a few seconds humpback songs vary in pitch and last between six and thirty minutes.
Unlike birdsongs, which are high-pitched and last only a few seconds, humpback songs vary in pitch and last between six and thirty minutes.
The amazing thing about the humpback whale's song however is that it is constantly changing.
The amazing thing about the humpback whale's song, however, is that it is constantly changing.
The following year however their song will be slightly different.
The following year, however, their song will be slightly different.
