This communication system might have grown more complex after our own ancestors split from other apes 6 million years ago.

FORBES: Can Chimps Talk?

Sudan's complex political manoeuvres may indeed split the rebel alliance and broaden the government's base in the north, but they may also sharpen the division between north and south.

ECONOMIST: Sudan loses its chains

Instead of complex food groups, the plate is split into an easy four: fruits, vegetables, proteins and grain.

FORBES: U.S.D.A. Topples Food Pyramid With A Very Expensive Plate