From the visual prognosis of our series, transscleral fixation of posterior chamber lens appears to be a viable alternative to improve functional visual acuity in acapsular aphakic patients.
The genetic predisposition of some humans to become obese does not originate from artificial or unnatural selection, as in our cow analogy, but probably from natural selection.
And artificial selection through breeding — or controlling which plants reproduce with which — can lead to dramatic results in just a few generations, compared to natural selection's millions of years.
OK, so Sarah Woodin suggests that when money is tight – meaning there is only just enough - making robots in large quantities – or mass-produced – might be a cheaper option than using humans.