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How fast can a submarine surface?

7803 upvotes • edgar_sbj

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Scientists think the Earth had 2 periods of time when it was almost completely covered in ice. They only lasted a few million years. Do we have any way of knowing if Europa or Enceladus might be in similar temporary freezes? Or is theirs a clearly permanent state?

7802 upvotes • UserNamesCantBeTooLo

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AskScience AMA Series: We've discovered that pancreatic cancer is detectable based on microbes in stool, with the potential for earlier screening in the future. AUA!

7793 upvotes • AskScienceModerator

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I use a P100 respirator to protect myself from infection, but sometimes powerfully malodorant smells (garbage full of diapers, etc) are noticeable through the mask. Does this indicate that I am at risk of infection from airborne sources, specifically corona virus?

7788 upvotes • klobersaurus

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How do we know what dinosaurs ate exactly if only their bones were fossilized?

7778 upvotes • its_me_michael

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Why do things get darker when wet?

7761 upvotes • WamsyTheOneAndOnly

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Is there a reason that the majority of Earth's landmass is in the northern hemisphere?

7761 upvotes • iguana64

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Family members are posting on Facebook that there has been no warming in the US since 2005 based on a recent NOAA report, is this accurate? If so, is there some other nuance that this data is not accounting for?

7757 upvotes • DaneMason

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How does NASA and other space agencies protect their spacecraft from being hacked and taken over by signals broadcast from hostile third parties?

7749 upvotes • Lorix_In_Oz

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We are Professor Tim Lenton and Dr Damien Mansell from the University of Exeter and we're about to launch our free global climate change course. Ask us anything about Climate Change, from challenges to solutions!

7745 upvotes • AskScienceModerator

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How fast can a submarine surface?	7803	edgar_sbj
Scientists think the Earth had 2 periods of time when it was almost completely covered in ice. They only lasted a few million years. Do we have any way of knowing if Europa or Enceladus might be in similar temporary freezes? Or is theirs a clearly permanent state?	7802	UserNamesCantBeTooLo
AskScience AMA Series: We've discovered that pancreatic cancer is detectable based on microbes in stool, with the potential for earlier screening in the future. AUA!	7793	AskScienceModerator
I use a P100 respirator to protect myself from infection, but sometimes powerfully malodorant smells (garbage full of diapers, etc) are noticeable through the mask. Does this indicate that I am at risk of infection from airborne sources, specifically corona virus?	7788	klobersaurus
How do we know what dinosaurs ate exactly if only their bones were fossilized?	7778	its_me_michael
Why do things get darker when wet?	7761	WamsyTheOneAndOnly
Is there a reason that the majority of Earth's landmass is in the northern hemisphere?	7761	iguana64
Family members are posting on Facebook that there has been no warming in the US since 2005 based on a recent NOAA report, is this accurate? If so, is there some other nuance that this data is not accounting for?	7757	DaneMason
How does NASA and other space agencies protect their spacecraft from being hacked and taken over by signals broadcast from hostile third parties?	7749	Lorix_In_Oz
We are Professor Tim Lenton and Dr Damien Mansell from the University of Exeter and we're about to launch our free global climate change course. Ask us anything about Climate Change, from challenges to solutions!	7745	AskScienceModerator