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

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Why does purple hair dye fade faster than other dyes?

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If we can cure malaria with tonic water, why are e.g. the Bill and Melinda Gates foundations still searching for a cure?

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Are there impurities in the water we drink that are beneficial, or even necessary, for human health? If I only drank ultra-pure distilled H20 (in addition to eating a normal diet) would I be at risk of suffering from any deficiencies?

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What would happen if you ate a chocolate bar, all of whose amino acids and sugars have opposite chirality of that of Earth-life organic compounds?

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Why is it so rare for a person with Alzheimer's to admit they have a memory problem (to the extent that I've never heard of it happening once in my entire life)?

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If you shot a laser at a log in a vacuum, would it melt instead of burning?

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When I put a cup of water on a scale, and stick a glass rod into the water WITHOUT touching the bottom of the cup, the reading on the scale increases slightly. Why is this?

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What determines the altitude of clouds?

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Are there any known examples of invasive species from before humans existed?

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If you stop cutting your hair, it grows to a certain length and then stops growing. How does your body know how long your hair is?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why does purple hair dye fade faster than other dyes?	1
If we can cure malaria with tonic water, why are e.g. the Bill and Melinda Gates foundations still searching for a cure?	1
Are there impurities in the water we drink that are beneficial, or even necessary, for human health? If I only drank ultra-pure distilled H20 (in addition to eating a normal diet) would I be at risk of suffering from any deficiencies?	1
What would happen if you ate a chocolate bar, all of whose amino acids and sugars have opposite chirality of that of Earth-life organic compounds?	1
Why is it so rare for a person with Alzheimer's to admit they have a memory problem (to the extent that I've never heard of it happening once in my entire life)?	1
If you shot a laser at a log in a vacuum, would it melt instead of burning?	1
When I put a cup of water on a scale, and stick a glass rod into the water WITHOUT touching the bottom of the cup, the reading on the scale increases slightly. Why is this?	1
What determines the altitude of clouds?	1
Are there any known examples of invasive species from before humans existed?	0
If you stop cutting your hair, it grows to a certain length and then stops growing. How does your body know how long your hair is?	0