/u/yupko's posts in /r/askscience

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Can chronic sleep deprivation permanently decrease cognitive ability?

1080 upvotes

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How far back in the past would modern humans be able to breathe the air without complications?

447 upvotes

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Crocodiles have a sprawling posture while some of the early archosaurs had an upright posture. Did crocodiles re-evolve the sprawling gait or were they part of a more ancient lineage?

245 upvotes

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Is the pain in a headache actually from the brain, or does it just feel like it?

32 upvotes

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If Mercury's orbit was tidally locked, how cold would the dark side be?

25 upvotes

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Did the Gulf Stream exist during the Ice Age?

17 upvotes

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If an injury closer to your organs is infected, is that worse than one farther away? Or does the circulatory system negate the distance?

15 upvotes

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Why are the Jurassic and Cretaceous considered separate periods? Since there was no mass extinction.

12 upvotes

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Hypothetically could desertification affect any land on Earth through gradual expansion and a long timescale? Or are some areas invulnerable to desertification?

9 upvotes

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Does the concept of "human genome" include all alleles of every gene, or merely what genes there are?

8 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Can chronic sleep deprivation permanently decrease cognitive ability?	1080
How far back in the past would modern humans be able to breathe the air without complications?	447
Crocodiles have a sprawling posture while some of the early archosaurs had an upright posture. Did crocodiles re-evolve the sprawling gait or were they part of a more ancient lineage?	245
Is the pain in a headache actually from the brain, or does it just feel like it?	32
If Mercury's orbit was tidally locked, how cold would the dark side be?	25
Did the Gulf Stream exist during the Ice Age?	17
If an injury closer to your organs is infected, is that worse than one farther away? Or does the circulatory system negate the distance?	15
Why are the Jurassic and Cretaceous considered separate periods? Since there was no mass extinction.	12
Hypothetically could desertification affect any land on Earth through gradual expansion and a long timescale? Or are some areas invulnerable to desertification?	9
Does the concept of "human genome" include all alleles of every gene, or merely what genes there are?	8