In this episode we hear about how flatworms regenerate, the evolution of photosynthesis, social interactions between mice, the properties of undead cells, and how steroids and genes interact.
Greater phenotypic variation is exposed by mutations in a gene regulatory system compared to mutations in its constitutive components, namely the transcription factor and the promoter, alone.
Single-nociceptor tracing reveals a novel somatotopic organization for the mammalian pain system, and physiological recordings and peripheral optogenetic behavior assays suggest that it is a possible mechanism underlying region-specific pain sensation.
