DrZhuKeeper's channel

science, history, philosophy




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There are stuff on YouTube that you don't get out of classroom, TV, or personal life.
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The pic in the background is Hubble Ultra Deep Field. It is the furthest we've peered into space as of now (~47 billion light years!). Each smudge, each point of light here is an entire galaxy!!!!! and there's over 10,000 galaxy here!

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