About the cover. The Kigali (Rwanda) International Peace Marathon depicted on the cover is an annual event, which was established as an amateur race aimed at using sports in the healing and reconciliation process in the aftermath of the 1994 Genocide against the Tutsi. It has become one of the most respected annual athletics events in the tropics. In the article by Tan et al., which concludes this issue of Temperature, the authors show that even small changes in thermal conditions affect marathon running performance. Photo credit: Isma250, via Wikimedia, used under CC BY-SA 4.0.
