Mingzi Xu & Lata Kalra explore two @plosbiology.org studies that identify a hotspot of animal #communication signal tempos between 0.5-4 Hz, hypothesizing that delta waves in the receivers’ #brains may drive its #evolution 🧪 Paper #1: plos.io/4ccWuhh Paper #2: plos.io/4ejLRcl Primer: plos.io/4egZ71l