Wouldn't the heart also be much larger and thus capable of pumping an increased quantity of blood around the body? Hence why the animals you mentioned (Elephants, whales) all have huuuumungous hearts :/ If you're scaling a person up, you scale their heart up too.
It would indeed, but if you look at elephants and whales they counteract gravity by being longer and bulkier rather than taller and slimmer like humans. Gravity mainly works vertically so tall and thin is exactly the wrong shape.
If you look at the upper limit of tall and thin on this planet (probably a giraffe), they have all kinds of enhancements just to survive (in particular to stop massive blood flow when they lower their heads). They are about as far as evolution can go in the tall/thin category. Going even five feet taller would be incredibly difficult. Scaling up to fifty feet tall is a near impossibility.
Also with a giraffe, half its height is neck or above, but half its mass (which gravity acts on) very much isn't. It's not the same with humans; most of the weight of our bodies is in the top half. We're just not equipped to be fifty feet tall in our present form.
T Rex's were about 20 ft tall and on two legs, but definitely longer than they were tall. We'd just have to evolve to be bulkier and have a lower centre of gravity - maybe get back on all 4s? :D
Do you believe that there were once giants?
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Wouldn't the heart also be much larger and thus capable of pumping an increased quantity of blood around the body? Hence why the animals you mentioned (Elephants, whales) all have huuuumungous hearts :/ If you're scaling a person up, you scale their heart up too.
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dappled
11 years ago
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It would indeed, but if you look at elephants and whales they counteract gravity by being longer and bulkier rather than taller and slimmer like humans. Gravity mainly works vertically so tall and thin is exactly the wrong shape.
If you look at the upper limit of tall and thin on this planet (probably a giraffe), they have all kinds of enhancements just to survive (in particular to stop massive blood flow when they lower their heads). They are about as far as evolution can go in the tall/thin category. Going even five feet taller would be incredibly difficult. Scaling up to fifty feet tall is a near impossibility.
Also with a giraffe, half its height is neck or above, but half its mass (which gravity acts on) very much isn't. It's not the same with humans; most of the weight of our bodies is in the top half. We're just not equipped to be fifty feet tall in our present form.
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disthing
11 years ago
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Ah OK, I see what you mean.
T Rex's were about 20 ft tall and on two legs, but definitely longer than they were tall. We'd just have to evolve to be bulkier and have a lower centre of gravity - maybe get back on all 4s? :D