For years, go was considered the last redoubt against the march of computers. machines might win at chess, draughts, othello, three-dimensional noughts and crosses, monopoly, bridge and poker. go, though, is different. the game required intuition, strategies in and character reading, along with vast numbers of moves and permutations. according to legend, it was invented by a chinese emperor to teach his subjects to balance and patience: qualities unique to human intelligence.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.