나는 누구인가???
나는 누구인가?
인간의 뇌 속에는 100조개의 신경망이 함께 작용해 살아있다는 느낌을 갖게 한다. 도대체 어떻게 이것이 가능해 졌을까? 위대한 사상가들은 공통적으로 인간의 의식을 가장 큰 미스터리라고 생각한다.
신경과학자인 라마찬드란 박사는 '한 인간의 뇌는 수십억 년 전에 셀 수 없이 많고, 멀리 떨어진 별 속에서 탄생한 원자들로 구성돼 있다. 이 입자들은 누대에 걸쳐 광년의 거리를 떠다니다 중력과 우연에 의해 함께 모여 이 순간 하나의 뇌를 이루게 되었다. 이렇게 만들어진 뇌는 그것을 탄생하게 만든 별에 대해 생각하는 것은 물론, 호기심을 갖게 되는 자신의 능력에 대해 생각하고, 그 능력 자체를 이상하게 느끼는 능력까지도 사유할 수 있게 됐다'라는 말로 인간 의식의 경이로움을 표현했다.
아래 신문기사 참조
2012-11-25 17:35
7 biggest mysteries of human body
Body bogglers
If it's a good mystery you're after, look no further than the bathroom mirror. You might think scientists would have charted every aspect of their home turf by now, but they haven't. Here are seven of the biggest body bogglers.
1. Why so wimpy?
If you shaved a chimpanzee and took a photo of its body from the neck to the waist, "at first glance you wouldn't really notice that it isn't human," said Kevin Hunt, director of the Human Origins and Primate Evolution Lab at Indiana University.
The two species' musculature is extremely similar, but somehow, pound-for-pound, chimps are between two and three times stronger than humans, Hunt told us. It's unclear why we're so much wimpier than our closest hominid relatives; perhaps our muscles' attachment points subtly differ, or our muscle fibers could be less dense.
Either way, the result is slightly humiliating. Once, in an African forest, Hunt watched an 85-pound female chimp snap branches off an aptly named ironwood tree with her fingertips. It took Hunt two hands and all the strength he could muster to snap an equally thick branch.
2. On the other hand …
Nine out of 10 people are right-handed. More mysterious than the dearth of southpaws is the fact that humans have dominant hands in the first place. Why just one hand with top-notch motor skills, instead of a double dose of dexterity? One theory holds that handedness results from having more intricate wiring on the side of the brain involved in speech (which also requires fine motor skills).
Because the speech center usually sits in the left brain hemisphere ― the side wired to the right side of the body ― the right hand ends up dominant in most people. However, this theory gets a big blow from the fact that not all right-handed people control speech in the left hemisphere, while half of lefties do. Perplexing.
3. Whose breasts?
Like all other female apes, women's breasts fill with milk when they have newborn babies to feed. But female humans alone have bloated bosoms at all other times, too. Scientists can't agree on what ― or who ― our "permanently enlarged breasts" are for. Most evolutionary biologists think breasts serve the purpose of attracting men, who get fooled into thinking a busty woman will make a great baby feeder (even though her breasts actually contain fat, not milk).
Anthropologists, meanwhile, tend to think breasts evolved for women and babies, not men, noting that in many cultures, men don't find big breasts remotely sexy. Florence Williams, author of "Breasts" (W.W. Norton, 2012), thinks women developed permanently enlarged bosoms to meet the greater energy needs of big-brained human babies. Hormones in breasts promote fat storage, and this stored fat gets released into milk during breast-feeding. In short, "breast fat goes toward forming the baby's brain," Williams told Life's Little Mysteries. But the theory has yet to gain universal acceptance.
4. What's up, buddies?
A couple of handfuls of your body aren't actually your body. For every one of your cells, 10 microbes live inside you, and these hangers-on collectively compose a few pounds (1 to 3 percent) of your total weight. Some of this in-house fauna cleans our skin while some helps us digest food, but the bulk of these microbes contribute to our bodily functions in ways unknown. Healthy people even harbor low levels of harmful viruses, which appear to do something besides sicken us.
"We're just learning that the consequence of antibiotics is that when you get rid of the good bacteria in our guts, we can develop autoimmune diseases [such as allergies]. We're not as advanced in our understanding of viruses. What do viruses do for us?" Vincent Racaniello, professor of microbiology and immunology at Columbia University, told Life's Little Mysteries. Clearly, we've signed up for a whole bunch of symbiotic relationships, and have no idea what we're getting out of the deal.
5. Wherefore appendices?
The poor old human appendix gets lumped in with the likes of wisdom teeth, ear-wiggling muscles and our other useless evolutionary holdovers. The worm-shaped organ's inconsequentiality seems proven by the fact that it can be removed with no obvious drawbacks. But biologists have recently begun to question the long-held assumption of appendix pointlessness. Some suggest it may help train the immune system during fetal development.
Other research indicates the organ serves as a "safe house" for the bacteria that aid in digestion, holding a secret stash of microbes that repopulate the rest of the digestive tract after gut-evacuating bouts of diarrhea. The word "appendix" means afterthought. But maybe, just maybe, it isn't one.
6. Why me?
How do the 100 trillion neural connections in our brains work together to create the feeling of being alive? Many great thinkers consider consciousness to be the biggest mystery not just of the human body, but the biggest one, period. As the neuroscientist V.S. Ramachandran put it, "[A]ny single brain, including yours, is made up of atoms that were forged in the hearts of countless, far-flung stars billions of years ago. These particles drifted for eons and light-years until gravity and chance brought them together here, now.
These atoms now form a conglomerate ― your brain ― that can not only ponder the very stars that gave it birth but can also think about its own ability to think and wonder about its own ability to wonder. With the arrival of humans, it has been said, the universe has suddenly become conscious of itself. This, truly, is the greatest mystery of all."
7. Hairy explanation
Theories abound when it comes to pubes. Some say these coarse, curly tendrils are sexual ornaments ― a visual signal of sexual maturity and a reservoir of smelly pheromones. Others think bushes keep our oh-so-precious nether regions cozy. Still others assert that they serve as padding, preventing chafing during sex. Whatever the reason, many modern people want this stuff gone. (Life’s Little Mysteries)
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페이스북황우석(Woo-seok, Hwang)
인간이 침팬지보다 약한 이유는..나무를 탈 필요가 없고 매일 달릴 필요도 없고.. 생존을 위해서 강해야 할 필요가 없기 때문도 이유일것 같다.. 인간도 만약에 어릴때부터 나무타고, 매일 달리고 생존 경쟁하다보면 엄청 힘이 충분히 세질 것 같은데.. 16 hour (s) ago
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페이스북facebooklunatique
정말 좋은 기사네요... 제목이 좀 마음에 안들긴하지만 11 minute (s) ago
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페이스북facebook방관자
애초에 지능이 낮아서 그런 면도 있고 게다가 힘 쓰기에 유리 한 근육을 못 쓴 다는 것도 애초에 종이 (레베루가) 달라서 그런 건데. ㅇㅇ 그리고 가슴은 좀 개드립인 듯. ㅇㅇ 35 minute (s) ago
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페이스북facebookYongkuk Choi
신비롭고, 궁금하군///// 인간이란? 1 hour (s) ago
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페이스북facebook걸래들아정신차려라
비웅신들이, 원숭이들은 태어나면서 부터 나무 매달려 이리 저리 댕기면서 근육을 단련시키니 힘이 세지는 것이지, 사람들도 태어나면서 부터 어릴때 부터 근육 단련시키면 나중 힘 세질 것이야, 이런 뻔한 이치를 몰라 ,, 학자라는 것들이,,뭐를 연구하는 거냐 비웅신들아. 2 hour (s) ago
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페이스북facebook조철현
재미있네요.
누군 다큐로 누군 가십으로.. 3 hour (s) ago
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페이스북facebook트윗하는순규씨
대신 인간은 뇌용량도 크고 뇌주름이 많지 않나? 그것은 육체보다 머리를 많이 쓴다는 뜻이고, 육체의 힘을 대신 할 도구와 힘센 동물을 이용 할 지혜를 가졌다는 것이지. 3 hour (s) ago
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페이스북facebook길들여진여우~
댓글에 유명인들이 왜 이리 많은가요 ㅋㅋ 4 hour (s) ago
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페이스북facebookHyentae Park
킴 로버트님 .. 기사인용 ㅋㅋㅋ 4 hour (s) ago
페이스북facebookRobert Kim
기사 마저 써줄까
8. 기자들은 왜 본문을 한눈에 요약한 제목을 안붙이는가?
한국 인터넷 찌라시 기자들은 생존과 직결되는 돈을 벌기 위해 외국 다큐멘터리나 공개 논문 일부를 발췌해서 그럴싸한 제목을 가져다 붙이고 먹고사는 방법으로 진화한 것이다. 5 hour (s) ago
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페이스북facebook아밍
책 제목 유방 충격적이네요... 6 hour (s) ago
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페이스북facebookkmh
돼야돼! 하면서요. 물론 서양인의 관점이지만 동아시아 국가는 사실상 문화가 서양인과 똑같아졌거나 똑같아지고 있으니 꽤 그럴싸한 이야기라고 생각합니다. 6 hour (s) ago
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