The animals walk on fours. But humans walk on two feet only and the fore limbs are hands used for holding things and not walking. The link below traces mystery behind.
http://www.dnaindia.com/scitech/report_why-humans-began-walking-upright_1666833
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Topic Author
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Gulshan Kumar Ajmani
@gkajmani
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Created
Sunday, 25 March 2012 18:45
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Tuesday, 30 November -0001 00:00
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