The human brain, in all its staggering complexity, is the product of millions of years of evolution.
For much of nature, natural selection and ‘survival of the fittest’ still play a dominant role; only the strongest can survive in the wild. As little as a few hundred years ago, the same was true for humans, but what about now?
The origin of modern humans has probably been the most debated issue in evolutionary biology over the last few decades.
Some children with severe combined immunodeficiency (SCID), a genetic disorder characterised by a reduced number of immune cells, have been treated using gene therapy.
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