/u/ghostoftheuniverse's posts in /r/askscience
How did Theia's impact change proto-Earth's composition? Is there a chunk of modern Earth that is primarily Theia, or has she been homogenized over these past billions of years?
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What are the neurological or psychological differences between the auditory hallucinations of voices, e.g., as in schizophrenia, and a persistent negative internal monologue in one's own inner voice?
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It's said that predators "smell fear." Pets can comfort us when we're sad. Do animals, humans included, produce emotion pheromones in addition to sex ones?
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Assuming they don’t collide into anything, what ultimate fates await the Pioneer and Voyager spacecraft?
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To what extent does a patient's will to live or die affect their survivability with a grave illness or injury? If a patient's mindset is medically significant, by what mechanism(s) does it operate to change, prolong, or hasten the outcome?
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How did complex processes that require many other equally complex ancillary processes to work, like sexual reproduction or aerobic respiration, evolve?
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Are penguins evolving to become fully aquatic? If they survive the holocene extinction, will the modern-day penguin be considered a transitional fossil in a few million years' time?
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