As the term 'ant procession' suggests, ants move in a line, following the ant in front ... and be overtaken by the ant behind it, the ants walking side by side never tried to force their way ...

Marked ant walking on markers. This image relates to a paper that appeared in the April 18, 2013, issue of Science Express, published by AAAS. The paper, by Danielle Mersch at University of ...