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Posted by on Oct 25, 2012 in Science |

Study: Human lives are long because grandmothers

Study: Human lives are long because grandmothers

(Cc) Collin Key

Beyond the goals we have in our lives, humans live longer “strictly necessary”, biologically speaking. We live several decades longer than our closest ape relatives, and several of those years are out of time when we have children. Several researchers have wondered why there is this difference, according to a study by the University of Utah, this is because it is evolutionarily advantageous to be grandmas for future generations.

Basically, the purpose of which humans live longer is because only with parents to raise children is not enough and you need to grandparents to help.

In biology, a living being is designed to pass on their DNA to create new living things, so, accordingly, no sense that a live longer when they can not have children.

A series of mathematical simulations made by scientists indicate that when present, the Life of chimpanzees evolve in less than 60,000 years to reach the number of living humans. The female chimps rarely live after becoming unable to have children, usually between 30 and 40 years.

The hypothesis of the grandmothers said that older females who can no longer have babies still have an interest in the welfare of their children’s children, and therefore caregivers. Having grandmothers present takes away the pressure while the mothers, allowing them to stay healthier and have more children.

Also, it would help to transfer the associated with a longer life for future generations, which means that more and more descendants would live longer.

Grandmothers theory was proposed in 1997, and has since been debated. With the simulation of this study is expected to validate this idea.

Link: Grandmas made humans live longer (Utah University)

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