/r/askscience

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If everything evolved from genderless single-celled organisms, where did genders and the penis/vagina come from?

828 upvotes • PotatoPotahto

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Why are rainstorms frequently accompanied with lighting, but snowstorms/blizzards rarely (never?) have lightning?

828 upvotes • buffsop

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Any studies/statistics on effects/effectiveness of 3rd dose of covid-19 Vaccines?

828 upvotes • militantcookie

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Are indoor gas stoves unsafe for human beings?

828 upvotes • NoEgoReddit

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Is mathematics a universal language? If so, how could we use it to communicate with another civilisation after initial contact?

826 upvotes • mozuk87

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What happens to pain while you sleep?

826 upvotes • anydentity

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Have humans always had acne?

826 upvotes • [deleted]

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Why aren't there any stars in the photographs taken from Saturn?

826 upvotes • dailanwalrus

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If two astronauts in EVA lose comms, is it true that they can press their glass visors together to speak?

826 upvotes • TheChivalrousRogue

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How far could Earth move either towards or away from the Sun before it left the Goldilocks zone of comfort and all temperate weather were eliminated?

826 upvotes • luxtabula

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If everything evolved from genderless single-celled organisms, where did genders and the penis/vagina come from?	828	PotatoPotahto
Why are rainstorms frequently accompanied with lighting, but snowstorms/blizzards rarely (never?) have lightning?	828	buffsop
Any studies/statistics on effects/effectiveness of 3rd dose of covid-19 Vaccines?	828	militantcookie
Are indoor gas stoves unsafe for human beings?	828	NoEgoReddit
Is mathematics a universal language? If so, how could we use it to communicate with another civilisation after initial contact?	826	mozuk87
What happens to pain while you sleep?	826	anydentity
Have humans always had acne?	826	[deleted]
Why aren't there any stars in the photographs taken from Saturn?	826	dailanwalrus
If two astronauts in EVA lose comms, is it true that they can press their glass visors together to speak?	826	TheChivalrousRogue
How far could Earth move either towards or away from the Sun before it left the Goldilocks zone of comfort and all temperate weather were eliminated?	826	luxtabula