Quote:
Originally Posted by tuccillo
One way to think about this is your life expectancy without civilization would be much shorter. So short, on average, that diseases such as heart blockages and cancer never develop in the average person. People are living much longer because of modern medicine - viruses, infections from wounds, and broken bones are no longer fatal, as well as dramatically decreased infant mortality. People are living so long that heart disease and cancer now have a chance to develop.
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This is true. We weren't designed to live this long so the human body wasn't designed to last this long. This is why knee and hip replacements are very common. Our joints just weren't designed to last twice what our life expectancy was.
Interesting to think about but since medicine has keep us alive so much longer than nature intended, then why did nature give us a brain good enough to develop advanced medicine to keep us alive this long?