Our latest issue of JBR starts off with a review perspective on “The Circadian Clock, the Brain, and COVID-19”. The rest of this issue is all about entrainment, with impressive diversity in study organisms. We encourage you to check out the intriguing article on phase response curves measured from the plant root circadian clock that follows as well. Our next article considers to the role of PDF in phase-resetting in Drosophila. The responses of African mole-rats to temperature cycles offers a fundamental advance in understanding of entrainment of animals living underground. Melatonin is shown to impact the phase of the cornea in a paper studying mice both in vivo and ex vivo. Our final paper in this issue examines the heritability of chronotype in people in a single population sample.