aggregated cells    aggregating cells    broader evolutionary strategy    cell eating    cells’ chemical signals    cellular slime mold dictyostelium discoideum    coin flip    collection of solitary amoebas    collective behavior    consistent aspect of slime-mold behavior.read    constant fraction of cells    constant number    corina tarnita    dense clouds of starlings dip    different strains of the slime mold    different way    environmental factors    form spores    further experimental work    further experiments    game changer    game theory    graduate student fernando rossine    handful of scientists    iain couzin    identical organisms    individual cells    irregular shapes of the individual amoebas    long time    maintenance of social behavior    mysterious glowing clams    natural selection    natural variation    new research    noisy gene expression    ongoing modeling work    organisms’ evolutionary transition    original population    previous work    simple model    single cells    slime molds    social behavior    social decision    stray cell    study of collective behavior.early clues    synchronization process    theoretical biologist    wildebeests thunder    work