Why do many scientists support the land bridge theory of migration? Check all of the boxes that apply.

1. There is a land bridge connecting Asia and North America today.

2. A land bridge connected Asia and North America thousands of years ago.

3. A land bridge would have allowed the first migrants to spread rapidly across North America.

4. Crossing the land bridge would have been simple for the first migrants.

5. People might have crossed a land bridge while hunting animals.

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.

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