/u/o99o99's posts

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Has the taboo around children's knowledge of sex existed forever, and if not, when and why did it emerge?

1443 upvotes • r/AskHistorians

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If humans were to travel in deep space, how would we keep our bearings without a magnetic field for a compass or gravity for a gyroscopic motion sensor?

110 upvotes • r/askscience

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How does the wavelength of EM radiation affect its ability to pass through a slit? How is wavelength relevant to the "amplitude" of a wave of light?

4 upvotes • r/askscience

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What is the "speed" of gravity?

1 upvotes • r/askscience

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Theoretically, could a human survive re-entry with a pressure suit and a parachute, and what would be the maximum speed they could travel at without burning up?

1 upvotes • r/askscience

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In most species, the male individual will perform some kind of mating dance and show off to the female during courtship. In how many species is this reversed, or shared, like in humans?

1 upvotes • r/askscience

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Does a tidal river's stream move at a different speed an hour after high tide compared to an hour before low tide?

1 upvotes • r/askscience

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How many molecules of an odour are needed before we can smell it?

1 upvotes • r/askscience

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Why do dark-skinned people from hotter countries never have light hair, which would reflect sunlight more effectively?

1 upvotes • r/askscience

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What are the possible effects of drinking 300ml of vodka in one go, as a 14 year-old male with a body mass of around 50/60kg?

1 upvotes • r/askscience

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Title	Upvotes	Subreddit	Mark as read	Favorited	Rating	Add to a list
Has the taboo around children's knowledge of sex existed forever, and if not, when and why did it emerge?	1443	AskHistorians
If humans were to travel in deep space, how would we keep our bearings without a magnetic field for a compass or gravity for a gyroscopic motion sensor?	110	askscience
How does the wavelength of EM radiation affect its ability to pass through a slit? How is wavelength relevant to the "amplitude" of a wave of light?	4	askscience
What is the "speed" of gravity?	1	askscience
Theoretically, could a human survive re-entry with a pressure suit and a parachute, and what would be the maximum speed they could travel at without burning up?	1	askscience
In most species, the male individual will perform some kind of mating dance and show off to the female during courtship. In how many species is this reversed, or shared, like in humans?	1	askscience
Does a tidal river's stream move at a different speed an hour after high tide compared to an hour before low tide?	1	askscience
How many molecules of an odour are needed before we can smell it?	1	askscience
Why do dark-skinned people from hotter countries never have light hair, which would reflect sunlight more effectively?	1	askscience
What are the possible effects of drinking 300ml of vodka in one go, as a 14 year-old male with a body mass of around 50/60kg?	1	askscience