How do we know the magnitude of TREE(3)? | AskScience Blog

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Monday, February 24, 2020

How do we know the magnitude of TREE(3)?

How do we know the magnitude of TREE(3)?


How do we know the magnitude of TREE(3)?

Posted: 23 Feb 2020 11:54 AM PST

I've gotten on a big number kick lately and TREE(3) confuses me. With Graham's Number, I can (sort of) understand how massive it is because you can walk someone through tetration, pentation, etc and show that you use these iterations to get to an unimaginably massive number, and there's a semblance of calculation involved so I can see how to arrive at it. But with everything I've seen on TREE(3) it seems like mathematicians basically just say "it's stupid big" and that's that. How do we know it's this gargantuan value that (evidently) makes Graham's Number seem tiny by comparison?

submitted by /u/GoalieSwag
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What makes a sugar be a sugar? And what makes it taste sweet?

Posted: 23 Feb 2020 07:14 PM PST

If fusion power was as widespread as fission today, what would the worst case "meltdown" scenario be and how bad would it be compared to fission meltdowns?

Posted: 23 Feb 2020 04:50 PM PST

If fusion power was as widespread as fission today, what would the worst case "meltdown" scenario be and how bad would it be compared to fission meltdowns? Why?

submitted by /u/V0yagerXyX
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What causes glass to be transparent? If atoms are mostly empty space, then why can't photons pass through that space and make every substance transparent?

Posted: 23 Feb 2020 03:10 PM PST

Were Velociraptors as dangerous/deadly as Jurassic Park depicts them to be?

Posted: 23 Feb 2020 09:03 PM PST

Why are some creeks particularly sandy?

Posted: 23 Feb 2020 07:17 PM PST

I live in the Appalachian piedmont, and the creek nearest me is the sandiest creek that I have ever seen in this area. It's typically clay here (metro Atlanta), and I have been wondering why this one's so different.

submitted by /u/delladoug
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How does mixing work? Why can't we unmix stuff?

Posted: 24 Feb 2020 12:54 AM PST

Why is it that after we mix two groups of things eg. 100 red marbles and 100 blue marbles, the marbles more or less look homogenized and we can never get two separate groups of red and blue again? Is there some sort of permutation probability effect in play here?

submitted by /u/kaddymate
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Is the shallow increase in water depth on Florida's West coast and the sharp increase in water depth on Florida's East coast a function of meteorology (e.g. prevailing winds, hurricanes, etc) or some other forces?

Posted: 23 Feb 2020 04:16 PM PST

As seen in this map, the depth of the water off the West coast of Florida gradually increases in depth whereas the depth of the water off the East coast rapidly increases: https://i.imgur.com/t943C74.jpg

submitted by /u/iiwfi
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If we find oil on another planet how many theories will it change/confirm?

Posted: 23 Feb 2020 07:17 PM PST

Why are female cheetahs solitary?

Posted: 23 Feb 2020 03:09 PM PST

Apparently female cheetahs are always solitary if they don't have cups, while male cheetahs form groups and hunt together. So I'm wondering: What causes female cheetahs to be solitary? When it comes to cats, lions and such, it's usually males who are territorial, while females are less territorial if at all I believe. What makes cheetahs the opposite in this aspect?

submitted by /u/Pharmafairy
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Do we know what birds communicate about?

Posted: 23 Feb 2020 03:40 AM PST

Does anyone study bird communication? Can we translate what birds talk about?

submitted by /u/LaVerdadEsQue
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Why do chicken egg yolks have so much cholesterol?

Posted: 22 Feb 2020 09:24 PM PST

Google says chicken egg yolks have approximately 180 mg of cholesterol per 17 g of yolk. This number seems shockingly high. What does a developing chick do with all that cholesterol? I thought cholesterol was an energetic dead end so only steroids and hormones make sense to me. Pork sausage on the other hand is about 54 mg per 76 g, around an order of magnitude lower per gram.

submitted by /u/thatwombat
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Why are so many medicines incompatible with alcohol?

Posted: 22 Feb 2020 05:36 PM PST

Does supermassive black hole size correlate with the size of the galaxy or are they unrelated?

Posted: 22 Feb 2020 08:37 PM PST

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