/r/askscience

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When Oxygen was plenty, animals grew huge. Why aren't trees growing huge now given that there is so much CO2 in the atmosphere?

1537 upvotes • ashwinmudigonda

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Why can the Hubble Space Telescope view distant galaxies in incredible clarity, yet all images of Pluto are so blurry?

1537 upvotes • Berelus

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AskScience AMA Series: We are earth scientists with the IRIS Consortium (www.iris.edu) and we study earthquakes and seismology. Ask us anything!

1536 upvotes • AskScienceModerator

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How do you save someone with a cut throat?

1535 upvotes • marqueemark78

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Why do we only see one big rainbow instead of myriad of very small ones? Every drop of water in the air kind of creates its own small rainbow by refracting the light, so why don't we see all of those individually?

1535 upvotes • Chem1calWaste

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Is there any consensus on the length of long-COVID?

1535 upvotes • humvee911

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What is the mechanism in which neurons change their connections? How are they able to 'move' their axon terminals to 'undo' a specific connection with neuron A, and create one with neuron B?

1534 upvotes • Chance_Programmer_54

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At what depth in water would it be physically impossible to urinate due to the pressure?

1532 upvotes • candytime9

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What is the data transfer rate of the Mars Curiosity Rover?

1532 upvotes • CptCreosote

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What exactly happens when a computer "freezes"?

1530 upvotes • Phallic

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
When Oxygen was plenty, animals grew huge. Why aren't trees growing huge now given that there is so much CO2 in the atmosphere?	1537	ashwinmudigonda
Why can the Hubble Space Telescope view distant galaxies in incredible clarity, yet all images of Pluto are so blurry?	1537	Berelus
AskScience AMA Series: We are earth scientists with the IRIS Consortium (www.iris.edu) and we study earthquakes and seismology. Ask us anything!	1536	AskScienceModerator
How do you save someone with a cut throat?	1535	marqueemark78
Why do we only see one big rainbow instead of myriad of very small ones? Every drop of water in the air kind of creates its own small rainbow by refracting the light, so why don't we see all of those individually?	1535	Chem1calWaste
Is there any consensus on the length of long-COVID?	1535	humvee911
What is the mechanism in which neurons change their connections? How are they able to 'move' their axon terminals to 'undo' a specific connection with neuron A, and create one with neuron B?	1534	Chance_Programmer_54
At what depth in water would it be physically impossible to urinate due to the pressure?	1532	candytime9
What is the data transfer rate of the Mars Curiosity Rover?	1532	CptCreosote
What exactly happens when a computer "freezes"?	1530	Phallic