/u/Knighthonor's posts in /r/askscience

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Back in the 1990s how did scientific discovery regarding the Milky Way changes how we view the Milky Way?

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Sperm: does it predetermine if it carry a X or a Y chromosome before fertilizing the egg?

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how does the human body do fusion of molecules, yet takes lot of energy for scientist to do the same in labs ?

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How did Scientist in the 19th century know Water was made of 2 Hydrogen atoms and 1 Oxygen atom, when Elements and Atoms as a concept was only theoretical and not yet proven?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Back in the 1990s how did scientific discovery regarding the Milky Way changes how we view the Milky Way?	1
Sperm: does it predetermine if it carry a X or a Y chromosome before fertilizing the egg?	1
how does the human body do fusion of molecules, yet takes lot of energy for scientist to do the same in labs ?	1
How did Scientist in the 19th century know Water was made of 2 Hydrogen atoms and 1 Oxygen atom, when Elements and Atoms as a concept was only theoretical and not yet proven?	1