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| Topic | How do scientists know about the universe just by looking thru some telescope? |
| Mackorov 12/04/17 12:43:06 PM #4: | Blightzkrieg posted... How do you know your monitor isn't just showing a bunch of random scribbles painted on by invisible mice. How do you know you're writing what you think you're writing? ... Copied to Clipboard! |
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