A body of evidence indicates that animals are decreasing in size as a general response to global warming. This reduction in size is actually proposed as a third universal response to global warming, together with the displacement in species ranges and phenological shifts. However, the mechanisms that explain such a pattern remain poorly understood. Ignacio Peralta-Maraver (@DrIgnacioPM2), who has recently joined the Modeling Nature with a contract Juan de la Cierva, and his c