http://news.cnet.com/8301-11386_3-57568273-76/first-complete-bionic-man-unveiled-in-u.k.
Bionic prosthetics & body parts can certainly help a lot of injured & crippled people.
http://www.fidis.net/resources/use-cases-scenarios/human-enhancement-robots-and-the-fight-for-human-rights
http://bradleypthomas.wordpress.com/2011/10/29/bionics-and-robotics
Artificial or synthetic humanoids would only need to appear human for cosmetic purposes.
http://www.nap.edu/catalog.php?record_id=10738
Depending upon what kind of strenuous or dangerous tasks, robots hardly need to look human.
http://www.cs.virginia.edu/~cko2z/spacematters/paper.html,
http://n4g.com/user/blogpost/pixelsword/333081
http://en.wikipedia.org/wiki/Why_The_Future_Doesn't_Need_Us:
http://www.wired.com/wired/archive/8.04/joy_pr.html
http://en.wikipedia.org/wiki/Bill_Joy#Technology_concerns,
http://www.fidis.net/resources/use-cases-scenarios/ambient-intelligence-putting-the-machines-in-control
http://spark.qualcomm.com/salon/ray-kurzweil-man-machine-merger
If biological life was formed or created on other worlds billions of years ago, eventually machines & robotics could have been developed. Some biological worlds might have been taken over by smart machines.
A popular TV series concludes with people from another world, escaping the smart machines.
http://en.wikipedia.org/wiki/Daybreak_(Battlestar_Galactica)#Epilogue
An enduring legend about a higher civilization that eventually goes into a full collapse.
http://en.wikipedia.org/wiki/Atlantis#Plato.27s_account,
http://www.thenewearth.org/The%20Fall%20of%20Atlantis.html
The survivors may have migrated to other lands & continents.
http://www.youtube.com/watch?v=OGNocRWrR2s
One of the best sites on symbolism & many other fascinating observations is,
http://www.atlanteanconspiracy.com/search/label/Atlantis
Eventually, humanity will have to coexist with smart machines & hope that they don't want to take over full control of the earth.
There is also the very tempting corporate possibility for those that want more power, to catalog & track practically everything on the planet.
http://arstechnica.com/tech-policy/2012/11/666-chip-why-a-texas-student-thinks-her-school-id-is-the-mark-of-the-beast
