Human evolution - a plausible scenario
Kids are getting taller.
This seemingly trivial observation carries with it deep implications as to the future of humankind, in the biological sense.
The human body is growing in height. Maybe also in width and volume? What about the brain and other organs?
Humans now live longer than ever before. Thanks to medicine, we've learned to counter the natural process of decay that affects living beings, because of aging as well as external entropy factors. There seems to be a similar process for inanimate things whereby change occurs constantly, morphing "features" (an ill-defined term) into new ones.
With the elongated human life, we have the opportunity not only to live more of our old age, but maybe to spend more time at each stage (childhood, adolescence, maturity, old age), by lenghthening the cycles that take us from one stage to the next. At each stage, the body and mind would be given more time to grow, resulting in a stronger individual.
How to achieve this? By the control of senescence and the technologies of repair. Examples:
* Genetic repair
* Food control (e.g. hormones, proteins, etc.)
* Understanding the "features" of each age and boosting those functions
There is however a counter movement as well. The ever faster cycles we have created (culturally) for ourselves also contribute to speeding up our own biological cycles. Consider earlier puberty as an example of a recent biological phenomenon. We would also need to fend off this and other counter movements.