And even as the early crime photographers sought human differences, the similarities kept cropping up.
Every time they ran the data set against human curators and found differences, they were able to improve the algorithm.
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Since there are few anatomical differences between human species, cognitive ones are the most likely cause of modern man's predominance.
The argument is that, despite obvious differences between human and nonhuman animals, we share a capacity to suffer, and this means that they, like us, have interests.
Respect human diversity, appreciating human variability and the differences among people as a fundamental way to reduce our in-group biases that lead to derogating others, prejudice and the evils of discrimination.
Dr Rassoulzadegan thinks that there are too few human genes to explain all the differences between people.
Professor Harry Moore, of the Centre for Stem Cell Biology at the University of Sheffield, UK, said there were a number of key differences between mice and human testes cells.
These studies have been made possible by the growth in catalogues and maps of genetic variation among human populations, as well as differences with our closest relatives, such as Neanderthal and chimpanzee.
You realize despite all our differences, there are so many human experiences and emotions that we share.
At the same time, many prominent geneticists, including those who mapped the human genome, have publicly said that genetic differences, especially those that occur along racial lines, don't amount to much.
The need to look after a fellow human being is far more important than any cultural or religious differences.
The same split-brain research that exposed shocking differences between the two hemispheres also revealed that the human left hemisphere has the interpreter.
It happens when people look past their ultimately minor differences to see themselves in the hopes and struggles of their fellow human beings.
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"These sorts of differences seem to be the sorts of things that if they occurred in human beings we would call them traditions, " he said.
Dr Gerome Breen, from the Institute of Psychiatry in London, said that the differences found in the rats were very likely to have their equivalent in the human brain.
You accept color differences, affirm them, celebrate them, but don't allow them to become a barrier to human community, " said Baldwin, author of a new King book, "In A Single Garment of Destiny: A Global Vision of Justice.
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