Observations of Efimov physics on Feshbach resonances in 39K and 7Li. The decay of the trapped atomic samples is analyzed according to Eq. (2) and expressed in terms of the loss rate coefficient L3 as a function of the s-wave scattering length a. The results in (a) were obtained in Florence on a broad Feshbach resonance in 39K atoms . The data in (b) and (c) show the results on 7Li from Bar Ilan University  and Rice University , respectively. These two experiments employed Feshbach resonances in two different atomic states.