/r/askscience

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[Psychology] Can adults lose/never obtain object permanence?

2158 upvotes • IPlayMidLane

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In UV-Visible spectroscopy, why aren't the absorption bands infinitely thin, since the energy for each transition is very well-defined?

2158 upvotes • Lichewitz

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Why are so many materials opaque? What's special about transparent materials like glass that sets them apart?

2157 upvotes • Xelopheris

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Can sperm really live for 5 days in the uterus at ANY time during a woman's cycle? NSFW

2156 upvotes • jiffyloobnoob

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Does iron still rust when it is molten?

2155 upvotes • Zetterbergs_Beard

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How does lead cause neurons to degrade? I've heard it "breaks down" the myeline sheath. What's going on at a chemical level?

2155 upvotes • nahdontsaythat

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Why does rabies cause a fear of water?

2154 upvotes • whatisontheinside

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Is this right? There's 48 people per square kilometer on earth. Does that mean if we stood at equal distance from each other we'd only have 20 meters in between us?

2154 upvotes • Ree81

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Brain tumors are known to directly cause depression, but could the opposite happen for someone that is already depressed?

2153 upvotes • dahdoc

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Are bird songs learned or built into the birds DNA?

2153 upvotes • Penguin7751

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
[Psychology] Can adults lose/never obtain object permanence?	2158	IPlayMidLane
In UV-Visible spectroscopy, why aren't the absorption bands infinitely thin, since the energy for each transition is very well-defined?	2158	Lichewitz
Why are so many materials opaque? What's special about transparent materials like glass that sets them apart?	2157	Xelopheris
Can sperm really live for 5 days in the uterus at ANY time during a woman's cycle? NSFW	2156	jiffyloobnoob
Does iron still rust when it is molten?	2155	Zetterbergs_Beard
How does lead cause neurons to degrade? I've heard it "breaks down" the myeline sheath. What's going on at a chemical level?	2155	nahdontsaythat
Why does rabies cause a fear of water?	2154	whatisontheinside
Is this right? There's 48 people per square kilometer on earth. Does that mean if we stood at equal distance from each other we'd only have 20 meters in between us?	2154	Ree81
Brain tumors are known to directly cause depression, but could the opposite happen for someone that is already depressed?	2153	dahdoc
Are bird songs learned or built into the birds DNA?	2153	Penguin7751