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How complex can evolution cause organisms to become? Do we even know at this point / will we ever know?
For example, we all have instincts to be afraid of heights, the dark, carnivores larger than us, etc. But say hypothetically we as a species pick a universal language, and speak it for thousands or millions of years. Is it possible for humans then to be born already instinctually knowing the language: the basic vocabulary, grammar, and all, because of those millions of years of evolution?
Or take a physical example: virtually all organisms capable of mobility do so through some sort of leg/fin/wiggly thing. Could there ever be an organism that evolves to (and I realize this sounds ridiculous, but its the clearest example I could think of) move using wheels, like a car?
Or are there hard limits on what evolution can produce?
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Assuming everyone here is either currently in college or have already graduated, what are some tips on effective studying? Better note taking, pneumonics, (legal) drugs, websites with lectures or practice problems, etc.
I personally have a hard time getting started. It's not like I have to be awake for a certain amount of time; I just can't focus until mid-afternoon. Once I get going though nothing really stops me until I get tired.