Although it's a bit counter-intuitive, Columbia actually never explored North America, instead visiting the other locations on this list instead. This lead to great discoveries but lots of suffering for the local inhabitants.
<span />
Answer: The author is biased against certain Olympic cycling because she coaches a cycling team.
From my knowledge, the Huang River is the birthplace of civilization in China. In fact, some of the most ancient settlements in Eastern Asia is situated on the banks of the Huang River. There is a Chinese cliché that says that "the Huang River is the cradle of the Chinese". Now to answer your question, the river provided a source of food and transportation, which encouraged early barter exchange throughout the small villages/tribes of ancient China.
The result of the Battle of Bunker Hill was a clear victory of the Americans.