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What happens to the retina and optic nerves in deep sea fish that are blind? |
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Are there any nonsleeping animals, and, if so, which is the largest? From an evolutionary point of view, it seems that nonsleeping animals would gain many advantages over their ordinary counterparts—mainly by having a greater amount of time to accumulate resources. Yet, as far as I know, everything sleeps, fish included. Why? Does living matter inherently need rest, is sleep somehow connected with the day-night cycle, or maybe energy expenditure would be too great in a nonsleeping animal? |
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Are there special genetic differences between a benign tumor and metastatic cancer that we could test for? |
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Why is there no mammal with green fur? Green is a good camouflage color, and nonmammals (for example, frogs, snakes, and birds) do come in green. Why not mammals?
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What will happen if you put chicken genes into humans? Will we grow feathers? Have beaks? If you put horse DNA into a fish, will it grow hooves? |
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Where do bird feathers get their colors from? Do they get the pigments from their food?
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Can pigs get brain freeze? |
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Does electromagnetism, ultrasound, or weightlessness have any effect on determining the sex of the worm Caenorhabditis elegans? |
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What is the molecular mechanism behind metamorphosis? |
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How can scientists tell the difference between fresh and saltwater fossils (fish or reptiles)? |
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