Read more about this week's topics:
Kuiper belt object: http://bit.ly/19xn3n3
Big cats: http://bit.ly/1apVBv2
Invisibility cloak: http://bit.ly/173ehAt
Dog domestication: http://bit.ly/1fJDuCu
Comet ISON: http://slate.me/1hQfqSV
Mars with water: http://bit.ly/1cpDzsi
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