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Why does it take so long for human children to grow up? A male chimp and male human, for example, both end up with the same body weight but they grow very differently: at year one the human weighs twice that of the chimp but at eight the chimp is twice that of the human. The chimp then gains its adult weight by 12 – six years before the human. A male gorilla is also a faster growing primate – a 150kg male gorilla weighs 50kg by its fifth birthday and 120kg by its tenth.
Clues to the answer can be found in the young human brain’s need for energy. Radioactive tracers allow scientists to measure the glucose used in different areas of the brain but this procedure is only used rarely when it is justified by investigating neurological problems. However, the few cases we do have reveal how radically different the childhood brain is from that in adults or infants.
From about the age of four to puberty, the young brain guzzles glucose – the cerebral cortex, its largest part, uses nearly (or more than) double that used earlier or later in life. This creates a problem. A child’s body is a third of the size of an adult but its brain is nearly adult sized. Calculated as a share, a child’s takes up half of all the energy used by a child.
originally posted by: Grovit
when a child is 2 years old they are half as tall as they will be when fully grown.
of course there are exceptions with people like shaq but for the most part.
half your height growing in your first 2 years
originally posted by: rickymouse
Living in a society of people with insect like characteristics really bugs me.
originally posted by: Skaffa
a reply to: dominicus
We are not gods Domi.. thinking we are smarter than nature could prove to be the biggest mistake we've ever made.
It's not a garbage design, it is perfect for what it is intended to do, it is perfectly balanced.
It's funny how human baby's are so weak and grow so slowly, it is probably because human mothers do not have enough energy to develop them further, and because a lot of ''resources'' are used to develop the brain instead of the body.
I really can't understand your reasoning.. to me it sounds like your'e saying: ''Fish are stupid! why don't they have wings and laser beams?''
we are gods, for we can create and we have created cities, cars, technology, art, music, crafts, etc...so we are like mini-gods in a sense. Also, we have figured out how to work along side nature, and in many ways manipulate it as well since our understanding increases into the nature, of um, nature.
Instead of fish being stupid, we catch the biggest and tastiest ones and figure how to farm raise them. Humans just naturally have the ability to manipulate their surroundings. Evolution itself keeps evolving from the weaker designs, to the better, faster, stronger, more intelligent designs.....its just part of nature. If you're saying everything is perfect as it is, you could have said that when humans were all cavemen and we could have kept it as that...but it didn't stay that way, it evolved, and will continue to do so. We no longer live in world where we need to be hunters, fighters, cavemen, and yet it is these exact animal instincts of selfishness that creates the greed, wars, division, separation. Time to move beyond that. If I was creating these bodies from scratch, or you were (hypothetically), I'm sure both of us would do it so much better than it is