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AskScience AMA Series: We are scientists who have just announced new discoveries from NASA's Parker Solar Probe mission to the Sun. Ask us anything!

2553 upvotes • AskScienceModerator

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Do beavers instinctively know how to build dams, or do they learn it from other beavers? If it's instinctual, are there any tools or structures that humans instinctually know how to make?

2553 upvotes • SpaceSmellsLikeMeat

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Is the dust transfer from the Sahara vital to the Amazon?

2553 upvotes • Clacimus

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Do bacteria change the nutritional content of milk when they turn it into yogurt?

2552 upvotes • Scrumpy7

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Can lightning really crack rocks and damage mountains like we see in fiction?

2551 upvotes • RedditLloyd

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How do scientists determine that the new Covid variant is x% more transmissible with y% more/less severe symptoms?

2551 upvotes • Silencer306

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If pressurized coal makes diamonds how are other “gems” created?

2551 upvotes • SnooRadishes8591

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On tv a while ago, Brian Greene said that we may see gravity as the weakest force because it may only exist partly in our universe and partly in another. Is this considered a credible theory today? If so, would the gravity waves we've observed be traveling through those other universes as well?

2550 upvotes • Algernon_Moncrieff

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Einstein was considered brilliant for his theory of special and then general relativity. How much of the groundwork was already present?

2548 upvotes • tyler1128

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What determines the number of propeller blades a vehicle has?

2547 upvotes • Steve1924

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
AskScience AMA Series: We are scientists who have just announced new discoveries from NASA's Parker Solar Probe mission to the Sun. Ask us anything!	2553	AskScienceModerator
Do beavers instinctively know how to build dams, or do they learn it from other beavers? If it's instinctual, are there any tools or structures that humans instinctually know how to make?	2553	SpaceSmellsLikeMeat
Is the dust transfer from the Sahara vital to the Amazon?	2553	Clacimus
Do bacteria change the nutritional content of milk when they turn it into yogurt?	2552	Scrumpy7
Can lightning really crack rocks and damage mountains like we see in fiction?	2551	RedditLloyd
How do scientists determine that the new Covid variant is x% more transmissible with y% more/less severe symptoms?	2551	Silencer306
If pressurized coal makes diamonds how are other “gems” created?	2551	SnooRadishes8591
On tv a while ago, Brian Greene said that we may see gravity as the weakest force because it may only exist partly in our universe and partly in another. Is this considered a credible theory today? If so, would the gravity waves we've observed be traveling through those other universes as well?	2550	Algernon_Moncrieff
Einstein was considered brilliant for his theory of special and then general relativity. How much of the groundwork was already present?	2548	tyler1128
What determines the number of propeller blades a vehicle has?	2547	Steve1924