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If a sphere passed through the 2nd dimension, it would appear as a circle out of thin air, grow, shrink, and disappear again. If a 4D sphere passed through the 3rd dimension, would it appear as if a normal 3D sphere appeared out of thin air, grew, shrank, and disappeared?

1752 upvotes • HazzMadd

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When lightning hits a large body of water, how far does the electricity actually travel?

1751 upvotes • Skipdr

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How are we able to tell the difference between sounds that are loud but far away, and ones that are close but quiet?

1751 upvotes • boblikespie1

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I learned from 'Green Planet' that many plants secrete 'defensive compounds' when attacked by herbivores, or even when 'warned' by neighbouring plants that herbivorous insects are attacking. But why do plants need to wait until they are attacked to accumulate these toxins in the leaves?

1751 upvotes • RoboticElfJedi

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In the long run, is worldwide income/wealth inequality increasing, decreasing, or fluctuating around a mean?

1750 upvotes • nebeeskan2

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How come we don't have an RSV vaccine?

1750 upvotes • gerd50501

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Hurricane Patricia Megathread

1749 upvotes • AskScienceModerator

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What technological advancement would make Thermoelectric Cooling a realistic substitute for conventional refrigeration systems?

1749 upvotes • dhroov_

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Are humans a reservoir species for any known animal illnesses?

1748 upvotes • djmor

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What kind of bonds do virus protein spikes form to bond to a cell receptor?

1748 upvotes • shawnwingsit

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
If a sphere passed through the 2nd dimension, it would appear as a circle out of thin air, grow, shrink, and disappear again. If a 4D sphere passed through the 3rd dimension, would it appear as if a normal 3D sphere appeared out of thin air, grew, shrank, and disappeared?	1752	HazzMadd
When lightning hits a large body of water, how far does the electricity actually travel?	1751	Skipdr
How are we able to tell the difference between sounds that are loud but far away, and ones that are close but quiet?	1751	boblikespie1
I learned from 'Green Planet' that many plants secrete 'defensive compounds' when attacked by herbivores, or even when 'warned' by neighbouring plants that herbivorous insects are attacking. But why do plants need to wait until they are attacked to accumulate these toxins in the leaves?	1751	RoboticElfJedi
In the long run, is worldwide income/wealth inequality increasing, decreasing, or fluctuating around a mean?	1750	nebeeskan2
How come we don't have an RSV vaccine?	1750	gerd50501
Hurricane Patricia Megathread	1749	AskScienceModerator
What technological advancement would make Thermoelectric Cooling a realistic substitute for conventional refrigeration systems?	1749	dhroov_
Are humans a reservoir species for any known animal illnesses?	1748	djmor
What kind of bonds do virus protein spikes form to bond to a cell receptor?	1748	shawnwingsit