From the Editors Gallery | September 2017 homepage image 1 Left to right: turtle embryo, emu embryo, snake embryo, gecko embryo. Photo by Takayuki Suzuki. Patrick Goymer Sep 22, 2017 Share Tweet Share Share Matsubara, Y., et al. Anatomical integration of the sacral–hindlimb unit coordinated by GDF11 underlies variation in hindlimb positioning in tetrapods. Nat. Ecol. Evol. 1, 1392-1399 (2017).