/u/[deleted]'s posts in /r/askscience

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How do we test for genetic predisposition? How do we test for ANY predisposition?

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Why is that only the parrots are trainable and not other birds or animals though all of them have tongues?

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I randomly generated 30 numbers and added up 5 at random. Is there a non-trial and error way to figure out which 5 numbers I added? Is this an example of a P vs. NP problem?

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How do we convert potential and kinetic energy into electricity?

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Why do sunrise and sunset appear to have a different light quality?

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How do some animals, such as cats and dogs, have strands of hair that are two or more colors? How does the hair folicle know when to stop being one color and start being a whole new color?

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What form does one molecule of H2O have?

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Why are oceans/seas salty compared to to lakes and rivers?

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How can a scientist ascertain that a 1.2-million-year-old stone flake found recently in Turkey is definitely a tool made by a human?

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Can humans go insane when left alone for a long period of time without any human contacts?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How do we test for genetic predisposition? How do we test for ANY predisposition?	13
Why is that only the parrots are trainable and not other birds or animals though all of them have tongues?	13
I randomly generated 30 numbers and added up 5 at random. Is there a non-trial and error way to figure out which 5 numbers I added? Is this an example of a P vs. NP problem?	13
How do we convert potential and kinetic energy into electricity?	13
Why do sunrise and sunset appear to have a different light quality?	13
How do some animals, such as cats and dogs, have strands of hair that are two or more colors? How does the hair folicle know when to stop being one color and start being a whole new color?	13
What form does one molecule of H2O have?	13
Why are oceans/seas salty compared to to lakes and rivers?	13
How can a scientist ascertain that a 1.2-million-year-old stone flake found recently in Turkey is definitely a tool made by a human?	13
Can humans go insane when left alone for a long period of time without any human contacts?	13