The U.S. desperately needs icebreaker ships. The one it has is a design failure
As climate change brings more boats to the Arctic, the U.S.'s need for boats that can cut through the ice has also increased.
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Who was Christopher Columbus?
Today we know what the world looks like. We've taken pictures of it from space! We know there are many countries, some far away, and that there are lots of different people. But for thousands of ...