/r/askscience

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Has there been a higher peak than Mt. Everest on Earth throughout its history?

6652 upvotes • dsdrft

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The Earth has a mass of 6*10^24 kg. How did scientists figure that one out?

6652 upvotes • ClutteredSmoke

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Is there a technical distinction between a jungle and a forest?

6648 upvotes • Revan3118

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the ISS is a pretty well closed system. Every astronaut has brought their own microbiome, do we know anything about what they leave behind and what survives?

6648 upvotes • mule_roany_mare

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Why is a swab required to be inserted deep into your nasal cavity to determine a positive or negative covid case, yet it can be spread merely by speaking too close to somebody?

6648 upvotes • c11anderson

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The oxygen level rise to 30% in the carboniferous period and is now 21%. What happened to the extra oxygen?

6646 upvotes • rob2508

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There are lots of well-characterised genetic conditions in humans, are there any rare mutations that confer an advantage?

6627 upvotes • RichardsonM24

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Is there any evidence that pricing a product at, say, 9.99, results in a higher volume of sales than pricing the same product at 10.00?

6623 upvotes • Articulated

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Why don't we ever sneeze while sleeping?

6623 upvotes • eniparxi

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Does the long term use of antidepressants cause any change in brain chemistry or organization?

6618 upvotes • monkeynose

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Has there been a higher peak than Mt. Everest on Earth throughout its history?	6652	dsdrft
The Earth has a mass of 6*10^24 kg. How did scientists figure that one out?	6652	ClutteredSmoke
Is there a technical distinction between a jungle and a forest?	6648	Revan3118
the ISS is a pretty well closed system. Every astronaut has brought their own microbiome, do we know anything about what they leave behind and what survives?	6648	mule_roany_mare
Why is a swab required to be inserted deep into your nasal cavity to determine a positive or negative covid case, yet it can be spread merely by speaking too close to somebody?	6648	c11anderson
The oxygen level rise to 30% in the carboniferous period and is now 21%. What happened to the extra oxygen?	6646	rob2508
There are lots of well-characterised genetic conditions in humans, are there any rare mutations that confer an advantage?	6627	RichardsonM24
Is there any evidence that pricing a product at, say, 9.99, results in a higher volume of sales than pricing the same product at 10.00?	6623	Articulated
Why don't we ever sneeze while sleeping?	6623	eniparxi
Does the long term use of antidepressants cause any change in brain chemistry or organization?	6618	monkeynose