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Author Topic:   How come evolution never developed the wheel?
ringo
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Posts: 15983
From: frozen wasteland
Joined: 03-23-2005
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Message 16 of 29 (846120)
12-29-2018 11:55 AM
Reply to: Message 9 by Dr Adequate
12-27-2018 4:01 PM


Dr Adequate writes:

You'd have to have a bit of the animal that would be separate, detached from the other bits. But then how would that bit get nutrients and oxygen?


Note how crankshafts, etc. are lubricated: force the oil into a passage in the axle and let it out through openings into the rotating parts.

And our geese will blot out the sun.

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RAZD
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From: the other end of the sidewalk
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Message 17 of 29 (846134)
12-30-2018 7:40 AM
Reply to: Message 15 by AZPaul3
12-29-2018 9:17 AM


thanks for all the fish
So, humans made wheel/axle, humans are a product of evolution, therefore evolution made wheel/axle.

Sure. Not quite what the discussion was about but ok. Why not.

It's the start, who knows what will be used as by-products for future constructions.

When full autonomous replicating automatons are developed, are they life or something that evolved from life?

Enjoy


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by our ability to understand
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AZPaul3
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Posts: 3633
From: Phoenix
Joined: 11-06-2006
Member Rating: 3.6


Message 18 of 29 (846225)
12-31-2018 3:31 PM
Reply to: Message 17 by RAZD
12-30-2018 7:40 AM


Re: thanks for all the fish
When full autonomous replicating automatons are developed, are they life or something that evolved from life?

Well, Will Smith called it a can opener so I'll go with that.

I'm more interested in the cybernetic implants the then humans will be sporting. We have nothing to fear from AI. Quite the contrary. We will be the AI.

Homo Sapiens Cybernetus.


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Taq
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(3)
Message 19 of 29 (846275)
01-02-2019 2:35 PM
Reply to: Message 1 by Lammy
12-26-2018 5:35 PM


Lammy writes:

Off the top of my head, I can't think of any animal that uses the wheel and axle for locomotive purposes. How come evolution never came up with the wheel and axle?

Wheels aren't very effective underwater where animals first evolved. It was much easier to evolve fins into limbs than into wheels, not to mention that limbs are much more effective on land than wheels. Try chasing down a deer in a forest with a wheeled vehicle and you will soon learn how much better limbs are than wheels.


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Pressie
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Posts: 1985
From: Pretoria, SA
Joined: 06-18-2010
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Message 20 of 29 (846299)
01-03-2019 5:03 AM
Reply to: Message 19 by Taq
01-02-2019 2:35 PM


Or on the African savanna. Whether herbivore or carnivore; limbs work better than wheels in chasing down the most succulent healthy grass or biggest kudus.
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CosmicChimp
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Posts: 306
From: Muenchen Bayern Deutschland
Joined: 06-15-2007


Message 21 of 29 (846300)
01-03-2019 6:25 AM
Reply to: Message 1 by Lammy
12-26-2018 5:35 PM


Tumbleweeds. Seed dispersal is often based on flying turning things.

There is a desert spider that curls up and rolls down a sand dune just like a wheel.

There must be a zillion more I just need to remember them.

So your point is moot.


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Tangle
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From: UK
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Message 22 of 29 (846301)
01-03-2019 7:17 AM


Wheels aren't just used for locomotion. We use them in gear boxes - effectively as levers. We use them in pulleys and as rotation devices. But the owl can't do a full 360 degree rotation for a reason - a wheel-like device can't be innervated or be supplied with blood without wrapping the pipes around the axle.

Je suis Charlie. Je suis Ahmed. Je suis Juif. Je suis Parisien. I am Mancunian. I am Brum. I am London.I am Finland. Soy Barcelona

"Life, don't talk to me about life" - Marvin the Paranoid Android

"Science adjusts it's views based on what's observed.
Faith is the denial of observation so that Belief can be preserved."
- Tim Minchin, in his beat poem, Storm.


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AnswersInGenitals
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Posts: 503
Joined: 07-20-2006


Message 23 of 29 (846309)
01-03-2019 2:49 PM
Reply to: Message 22 by Tangle
01-03-2019 7:17 AM


a wheel-like device can't be innervated or be supplied with blood without wrapping the pipes around the axle.

Not true. The crank shaft in your car is a fancy wheel and has passages for supplying oil through the connecting rod to the piston. Electric motors have brushes or bushings for passing electric current to the rotor (a wheel) and these could also be used for passing signals as they are in rotating radar antennas. Not sure how these would work for nerve signals which are a combination of electrical and chemical.


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Lammy
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Posts: 3598
From: Chicago
Joined: 03-29-2004


Message 24 of 29 (846311)
01-03-2019 9:49 PM
Reply to: Message 19 by Taq
01-02-2019 2:35 PM


What are you talking about? Wheels work much better underwater than limbs. Think propeller. Heck, in the microscopic world the flagellum is practically a spinning wheel propeller anyway.

If you say the word "gullible" slowly, it sounds like oranges. Go ahead and try it.

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Tanypteryx
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Posts: 1921
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.7


(1)
Message 25 of 29 (846312)
01-03-2019 11:06 PM
Reply to: Message 24 by Lammy
01-03-2019 9:49 PM


Heck, in the microscopic world the flagellum is practically a spinning wheel propeller anyway.

And it works really well, in single celled organisms. The only multi cellular organisms with flagella, to transport the organism, are like Volvox colonies with individual cells each having a flagellum. They all beat and the spherical colony kind of tumbles through the water. We also see flagella functioning as turbulence generators that cause water to stream around the organism bringing potential nutrients close.

These work because they are single cells that do not have to provide nerve and molecular exchange mechanisms connecting the "wheel" appendage to the main body.

Evolution works at modifying existing features rather than inventing the best solution humans can think up.


What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy

The reason that we have the scientific method is because common sense isn't reliable. -- Taq


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caffeine
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Posts: 1573
From: Prague, Czech Republic
Joined: 10-22-2008
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(1)
Message 26 of 29 (846322)
01-04-2019 6:45 AM
Reply to: Message 25 by Tanypteryx
01-03-2019 11:06 PM


Eukaryotic flagella like those of Volvox do not work on a wheel and axle principle, they flail around like whips. The International Society of Protistologists recommends that they should instead be called cilia, since they are homologous with cilia rather than with bacterial flagella. Etymologically it would make more sense the other way round, since flagella should flail, not rotate, and I think the eukaryotic examples were described first anyway.
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Tanypteryx
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Posts: 1921
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.7


(1)
Message 27 of 29 (846338)
01-04-2019 10:55 AM
Reply to: Message 26 by caffeine
01-04-2019 6:45 AM


Eukaryotic flagella like those of Volvox do not work on a wheel and axle principle, they flail around like whips. The International Society of Protistologists recommends that they should instead be called cilia, since they are homologous with cilia rather than with bacterial flagella. Etymologically it would make more sense the other way round, since flagella should flail, not rotate, and I think the eukaryotic examples were described first anyway.

Good information, thanks.

I was thinking of cilia as what I see on Paramecium and Stentor where they are shorter and have a synchronized beat, where as, on Volvox they don't seem to be synchronized.

Anyway, it is one of the nice things about EvC, learning new stuff.


What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy

The reason that we have the scientific method is because common sense isn't reliable. -- Taq


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AZPaul3
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Posts: 3633
From: Phoenix
Joined: 11-06-2006
Member Rating: 3.6


(1)
Message 28 of 29 (846339)
01-04-2019 12:33 PM


You two are talking this thing, yes?

click to enlarge.


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caffeine
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Posts: 1573
From: Prague, Czech Republic
Joined: 10-22-2008
Member Rating: 4.4


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Message 29 of 29 (846340)
01-04-2019 2:10 PM
Reply to: Message 28 by AZPaul3
01-04-2019 12:33 PM


You two are talking this thing, yes?

That's the bacterial one that rotates like a wheel, yes. Many eukaryotes have a structure that looks superficially similar, but is unrelated and completely different structurally. It doesn't rotate, but is bent back and forth by the movement of the microtubules inside (pic below); kind of like how muscle fibres work.


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