So, I hear that giant robots and giant aliens wouldnt be able

>>8640708
Simple really.
You double in height muscle mass only doubles but overall weight is squared.

There comes a size in which muscle mass can compensate.
Legs break bones snap human is dead.

In your picture... look at those fucking feet!
Increased surface area, short but wide legs with minimum joints and a small neck and head.

That is all nature can do with Carbon based DNA.

>>8640719
so the overall problem for having a human like organism taller than we are is the weight?

Is there a way to circumvent this problem in a manner that might be somewhat feasible?

How in the name of all that is holy would you maintain blood pressure at 70 feet?

Or did they just never raise their head up?

>>8640731
Really big heart? Multiple heart/heart valves?

one of the main reasons that dinosaurs could exist then but cant exist now is because the oxygen content of the air was muuuuuch higher back then; much easier to circulate oxygen throughout the body.

Just think about how a mouse could fall off a house and live. That's the equivalent of a human falling off a skyscraper.

>>8640727
Of course all this means is that your giant robot or alien wouldn't be humanoid and would be inefficient unless there was some need for it to be huge.

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>>8640744
>needing to have a reason for giant robots

come the fuck on, son.

>>8640727

>so the overall problem for having a human like organism taller than we are is the weight?

Not just weight but yes.
Overall we would not "function"
Anatomically we are made to be small.
Unlike those dinosaurs.


>Is there a way to circumvent this problem in a manner that might be somewhat feasible?

Stronger muscles and bones.

But even then you are not gonna grow fifty feet.

That is just too heavy, exertion would kill you.
Need to cool the body.
But just standing up would take all your strenght.

>>8640747
so super-dense muscles and bones made out of some sort of naturally occurring super biomaterials is pretty much the only way, then?

what of machines? Surely, as metallurgy and robotics become more sophisticated, we could develop giant robots that are at least, say, four meters tall.

>>8640753
I think the limit to how much metal you can put on one another is two thousand meters (?)
I mean if you wanted to make a building of metal it could reach a certain height and then collapse under its own weight.
So if that applies to our robot friends then you can make robots as tall as sky scrapers.

Their energy source is electricity so if you have a dense power reactor (fusion, fission) then they can move...slowly :)
Assuming you want legs and not tracks...
Nothing else would be able to move such a beast though..
But anyway robots are already possible in height more than four meters. Limitation is power source.
How do you move this hunk of metal?

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>>8640731
>How in the name of all that is holy would you maintain blood pressure at 70 feet?
>Or did they just never raise their head up?

Biologist here. Huge hearts and muscle in their veins, just like giraffes. Probably other adaptions we don't know about was well.

Also, as >>8640737 said, the oxygen levels in the atmosphere was much higher back then. Oxygen is the main limiting factor today. After oxygen, gravity and energy needs are big factors as well. If you're a big animal, you need a huge body with lots of muscles to move around, which in turn means you need a lot of energy and a lot of oxygen. Because the size of animals are dictated by evolution, the size of animals will always be what ever is the most adapted to the environment they live in (which excludes a lot of cool evolutionary mechanisms like mate choice, extened phenotype, honest signalling, insular gigantism, foster's rule, handicap principle, Fisherian runaway
,green-beard effect, inclusive fitness etc etc).

It's basically a melting pot of different factors, and and only in special circumstances when factors that counteract a large size is removed do we find big animals. Examples include high oxygen content in the atmosphere on land (dinosaurs), lack of predation and/or competition (iland gigantism), access to a lot of calories, or living in water (where the effects of gravity is counteracted by buoyancy) (Dinosaurs, whales).

>>8640779
>which INCLUDES* a lot of cool evolutionary mechanisms

typo

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>>8640779
Also:

Allen's rule states that the body shapes and proportions of endotherms vary by climatic temperature by either minimizing exposed surface area to minimize heat loss in cold climates or maximizing exposed surface area to maximize heat loss in hot climates. It is named after Joel Asaph Allen who described it in 1877.

Bergmann's rule states that within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, and species of smaller size are found in warmer regions. It applies with exceptions to many mammals and birds. It was named after Carl Bergmann who described it in 1847.

Cope's rule states that animal population lineages tend to increase in body size over evolutionary time. The rule is named for the palaeontologist Edward Drinker Cope.

Foster's rule or the Island rule states that members of a species get smaller or bigger depending on the resources available in the environment. The rule was first stated by J. Bristol Foster in 1964 in the journal Nature, in an article titled "The evolution of mammals on islands".

Gause's law or the competitive exclusion principle states that two species competing for the same resource cannot coexist at constant population values. The competition leads either to the extinction of the weaker competitor or to an evolutionary or behavioral shift toward a different ecological niche.

Gloger's rule states that within a species of endotherms, more heavily pigmented forms tend to be found in more humid environments, e.g. near the equator. It was named after the zoologist Constantin Wilhelm Lambert Gloger, who described it in 1833.

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>>8640792
Haldane's rule states that if in a species hybrid only one sex is sterile, that sex is usually the heterogametic sex. The heterogametic sex is the one with two different sex chromosomes; in mammals, this is the male, with XY chromosomes. It is named after J.B.S. Haldane.

Hennig's progression rule states that when considering a group of species in cladistics, the species with the most primitive characters are found within the earliest part of the area, which will be the center of origin of that group. It is named for Willi Hennig, who devised the rule.

Jordan's rule states that there is an inverse relationship between water temperature and meristic characteristics such as the number of fin rays, vertebrae, or scale numbers, which are seen to increase with decreasing temperature. It is named after the father of American ichthyology, David Starr Jordan.

Rapoport's rule states that the latitudinal ranges of plants and animals are generally smaller at lower latitudes than at higher latitudes. It was named after Eduardo H. Rapoport by G. C. Stevens in 1989.

Rensch's rule states that across animal species within a lineage, sexual size dimorphism increases with body size when the male is the larger sex, and decreases as body size increases when the female is the larger sex. The rule applies in primates, pinnipeds (seals), and even-toed ungulates (such as cattle and deer). It is named after Bernhard Rensch, who proposed it in 1950.

Thorson's rule states that benthic marine invertebrates at low latitudes tend to produce large numbers of eggs developing to pelagic (often planktotrophic [plankton-feeding]) and widely dispersing larvae, whereas at high latitudes such organisms tend to produce fewer and larger lecithotrophic (yolk-feeding) eggs and larger offspring, often by viviparity or ovoviviparity, which are often brooded. It was named after Gunnar Thorson by S. A. Mileikovsky in 1971.

>>8640792
>Edward Drinker Cope.
Did he turn to drink to cope with his vigorous working regimen?

>>8640792
>Cope's rule states that animal population lineages tend to increase in body size over evolutionary time.

As observed throughout the history of the united states.