By Joshua Mitteldorf
Because the Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary thought, specially within the quarter of genetics. at the same time, a technology of multilevel choice has discovered its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic idea of senescence, wherein getting older has been affirmatively chosen since it degrees the demise expense over the years, aiding to stabilize inhabitants dynamics and stop extinctions. Read more...
summary: because the Nineteen Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary concept, in particular within the sector of genetics. at the same time, a technological know-how of multilevel choice has chanced on its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic concept of senescence, wherein getting older has been affirmatively chosen since it degrees the loss of life price through the years, supporting to stabilize inhabitants dynamics and forestall extinctions
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Extra resources for Aging is a group-selected adaptation: theory, evidence, and medical implications
They also enjoy 30-40% lower mortality rates . In CR experiments with rodents, the longest-lived mice are both eating least and exercising most [17, 74]. , hormesis. If the body is shortening its lifespan when un-stressed by exercise, this is not because of any metabolic necessity, but simply that it is choosing a shorter lifespan. Exercise hormesis, like the CR effect, is impossible to reconcile with any of the non-programmed theories of aging. But it poses particular difficulty for theories of aging from oxidative damage, since exercise increases oxidative stress and increases lifespan.
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