article nonhuman Escherichia coli 2 Active agents 1 Active particles 1 Animals 1 Bacterial ecologies 1 Biochemistry 1 Cell culture 1 Cell populations 1 Cell proliferation 1 Cellulars 1 Chemical concentrations 1 Chemical gradients 1 Chemical stability 1 Economic and social effects 1 Efficient strategy 1 Embryonic development 1 Exact results 1 Exploration model 1 Exposed to 1 Free spaces 1 In contexts 1 Individual cells 1 Local geometry 1 Machinery 1 Mean-field versions 1 Modes of motion 1 Movement datum 1 Non-Markovian 1