Human
hideA human is a member of a species of bipedal primates in the family Hominidae (taxonomically Homo sapiens—Latin: "wise man" or "knowing man"). DNA and fossil evidence indicates that modern humans originated in east Africa about 200,000 years ago . When compared to other animals and primates, humans have a highly developed brain, capable of abstract reasoning, language, introspection and problem solving. This mental capability, combined with an erect body carriage that frees the forelimbs (arms) for manipulating objects, has allowed humans to make far greater use of tools than any other species. Humans are distributed worldwide, with significant populations inhabiting most land areas of Earth. The human population on Earth is greater than 6.7 billion, as of February 2009,
Like most higher primates, humans are social by nature. Humans are particularly adept at utilizing systems of communication—primarily spoken, gestural, and written language—for self-expression, the exchange of ideas, and organization. Humans create complex social structures composed of many cooperating and competing groups, from families to nations. Social interactions between humans have established an extremely wide variety of traditions, rituals, ethics, values, social norms, and laws, which together form the basis of human society. Humans are distinctive as a species on the Earth by having a perception of beauty and aesthetics at least to a point which results in a material culture. This, when combined with the desire for self-expression and a proportionally large brain-size, has led to innovations such as art, written language, music and science.
Humans seek to understand and influence the environment around them by trying to explain and manipulate natural phenomena through philosophy, art, science, mythology, and religion. This natural curiosity has led to the development of advanced tools and skills. Although humans are not the only species to use tools, they are unique in building fires, cooking their food, and clothing themselves; as well as using other advanced technologies. Humans pass down their skills and knowledge to the next generations and so are regarded as dependent upon culture.
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News tagged with human
Gene Hijacked By HIV Ancestor Suggests New Way to Block Viral Reproduction
9 hours ago |
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(PhysOrg.com) -- An ancestor of the AIDS virus hijacked an entire gene, perhaps from some prehistoric cat it had infected, a gene that makes it much better able to infect humans, according to a study published ...
New technology helps scientists understand ancient fossils
Other Sciences / Archaeology & Fossils
8 hours ago |
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Some of the world's oldest human bones and other ancient relics are studied here using some of the world's newest technologies.
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New platinum compound shows promise in tumor cells
9 hours ago |
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(PhysOrg.com) -- MIT chemists have developed a new platinum compound that is as powerful as the commonly used anticancer drug cisplatin but better able to destroy tumor cells.
Research is shattering traditioinal notions of laser limits
10 hours ago |
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Air Force Office of Scientific Research and National Science Foundation-funded professor, Dr. Xiang Zhang has demonstrated at the University of California, Berkeley the world's smallest semiconductor laser, ...
Not all parents place their babies 'back to sleep,' research finds
10 hours ago |
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Placing infants on their backs for sleep can help reduce the risk of Sudden Infant Death Syndrome (SIDS). But a study by Yale School of Medicine researchers and their colleagues shows that while the practice helped reduce ...
Brain scans show distinctive patterns in people with generalized anxiety disorder
Medicine & Health / Psychology & Psychiatry
10 hours ago |
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Scrambled connections between the part of the brain that processes fear and emotion and other brain regions could be the hallmark of a common anxiety disorder, according to a new study from the Stanford University School ...
Transcription factors guide differences in human and chimp brain function
11 hours ago |
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Humans share at least 97 percent of their genes with chimpanzees, but, as a new study of transcription factors makes clear, what you have in your genome may be less important than how you use it.
Delivering medicine directly into a tumor
12 hours ago |
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Researchers at Burnham Institute for Medical Research at University of California, Santa Barbara have identified a peptide (a chain of amino acids) that specifically recognizes and penetrates cancerous tumors but not normal ...
With amino acid diet, mice improve after brain injury
12 hours ago |
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Neurology researchers have shown that feeding amino acids to brain-injured animals restores their cognitive abilities and may set the stage for the first effective treatment for cognitive impairments suffered by people with ...
Antidepressant Can Change Patient's Personality
Medicine & Health / Psychology & Psychiatry
12 hours ago |
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(PhysOrg.com) -- The nation is still debating the effects of antidepressant medications on brain chemistry almost 20 years after publication of the best-seller "Listening to Prozac." Though selective serotonin reuptake inhibitors ...
Facebook (and Systems Biologists) Take Note: Network Analysis Reveals True Connections
Technology / Computer Sciences
12 hours ago |
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(PhysOrg.com) -- Facebook figures out that you know Holly, although you haven't seen her in 10 years, because you have four mutual friends -- a good predictor of direct friendship. But sometimes Facebook gets ...
New technology could boost disease detection tests' speed and sensitivity (w/ Video)
Nanotechnology / Bio & Medicine
13 hours ago |
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A team led by Yale University scientists has developed a way to rapidly manipulate and sort different cells in the blood using magnetizable liquids. The findings, which will be published the week of December ...
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