"Hair-cell".., how does this Melanin-based solar cell works..?
"Half a kilo of hair can be bought for only 16p in Nepal and lasts a few months". So it has a limited life time then, with a (hair) refill option?
http://www.dailymail.co.uk/sciencetech/article-1212005/Teenager-invents-23-solar-panel-solution-developing-worlds-energy-needs-human-hair.html
Hunting mammoths and cooking the meat with a hair cell sounds great .
More info about the "hair-cell":
http://peswiki.com/index.php/OS:Human_Hair_Solar_Panel_by_Milan_Karki#Response_to_Skeptics
http://www.gizmag.com/human-hair-solar-cell/13080/