Articles like these always reinforce my belief in science and the theory of evolution, and they invariably make me wonder how in the world some people can just ignore these scientifically proven facts in favor of two-thousand year old man-made books:
Scientists have identified a clutch of subtle genetic changes that have shaped our minds and bodies into the unique form that sets humans apart from chimpanzees and the rest of the animal kingdom.
The work by researchers in the US represents a landmark in a search that has occupied philosophers and scientists for millennia and one that goes to the heart of understanding what it means to be human.
The findings offer up the humbling conclusion that the secret of human success may owe more to what we lost along the path of evolution, rather than anything we gained.
When the human genome was first deciphered more than a decade ago, some scientists expected to find extra genes that explained why humans had an intellectual edge over their closest living relatives and other species. But since diverging from chimpanzees around seven million years ago, it turns out that our human ancestors lost several hundred snippets of DNA, which together led to traits that are uniquely human, the researchers claim.
In ditching these chunks of DNA, our ancient ancestors lost facial whiskers and short, tactile spines on their penises. The latter development is thought to have paved the way for more intimate sex and monogamous relationships. The loss of other DNA may have been crucial in allowing humans to grow larger brains.
[...]
One missing section of DNA was found to block a gene that, in other animals, stifles the growth of brain cells. Losing that DNA may have been a pivotal moment in human development, as it allowed parts of the human brain to expand into the most complex organ known.
There’s a lot more interesting information in the full article.
No comments:
Post a Comment