/u/lagerdalek's posts in /r/askscience
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A question from my five year old: "How does a seed know to start growing when it is planted instead of in the seed packet?" I was explaining well enough, but couldn't answer exactly what triggers the process.
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What do we know about the rapidity, nature or effect of the switch of the earth's magnetic polarity? Is it at all possible to be a non event, can we every really be prepared, or, are we, in this era of technical dependency, awaiting an inevitable event of apocalyptic proportions?
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Mathematically speaking, if a given game of Sudoku, in its initial state, has only one possible outcome, will it always solvable without having to resort to guessing a cell's value?
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Am I likely to have accidentally eaten many tardigrades in my life, and if so, would I have digested them or would they have just passed through me, laughing at my puny attempts to do so?
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At a rough estimate, in what percentage of the universe, if I were to suddenly appear, would I have a significant gravitational effect (I will leave the definition of significant open to debate)?
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