How do army ants build bridges with no one in charge?

Eciton army ants build bridges with their own bodies - but with limited brainpower and no global perspective, how do they do it? Read more: http://ow.Eciton army ants build bridges with their own bodies - but with limited brainpower and no global perspective, how do they do it? Read more: http://ow.Eciton army ants build bridges with their own bodies - but with limited brainpower and no global perspective, how do they do it? Read more: http://ow.