"If 33% of (the) urban population lives in slums -- they may live in sub-human conditions, but still, they are a drain on the economy, " he said.

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Hailing from Siberia's Denisova Cave, the girl was from an ancient human sub-species similar to the Neanderthals.

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It should help them to find out where sub-sequences of the human genetic code fit into the overall gene map.

ECONOMIST: Let��s get this straight

Today, areas such as sub-Saharan Africa that have hosted human life for millennia still use far more phonemes in their languages than more recently colonized regions do.

WSJ: Study Points to a Single, Original Language for All Humans

The missing ingredient turned out to be sub-bass: The lowest frequencies audible to the human ear, used extensively by dance acts to give their rhythm tracks an added wallop.

BBC: Sound of 2013: Haim

The climate system consists of several sub-systems, including the hydrosphere, the biosphere, the atmosphere, the geosphere and human systems.

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Coalition sub-group: all of those who defend truly free markets as the tried-and-true path to human advancement.

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