1 | Why is most matter in the universe that we see
Matter and not anti matter? |
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2 | Is the universe 99% empty space? |
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3 | What is the biggest star we yet know of? |
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4 | What is the hottest star we yet know of? |
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5 | Is a proton bigger, smaller or the same size as a neutron? |
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6 | What year did Einstein die? |
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