How might costly cooperation evolve from scratch? A new study using cross-feeding in a bacterial system suggests that spatial proximity between partners and reciprocal fitness feedbacks between them are essential drivers of stable cooperative partnerships.

中文翻译：

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微生物互惠主义：您是否仍需要我，您仍将养活我吗？

昂贵的合作将如何从头开始发展？一项在细菌系统中使用交叉喂食的新研究表明，伴侣之间的空间接近性以及他们之间的相互适应性反馈是稳定合作伙伴关系的重要驱动力。