A free-electron laser enables precise tracking of electron movement between segments of a dissociating molecule. [Also see Perspective by Pratt] Authors: Benjamin Erk, Rebecca Boll, Sebastian Trippel, Denis Anielski, Lutz Foucar, Benedikt Rudek, Sascha W. Epp, Ryan Coffee, Sebastian Carron, Sebastian Schorb, Ken R. Ferguson, Michele Swiggers, John D. Bozek, Marc Simon, Tatiana Marchenko, Jochen Küpper, Ilme Schlichting, Joachim Ullrich, Christoph Bostedt, Daniel Rolles, Artem Rudenko

An iodide salt with a chiral counterion proves an efficient catalyst for preparation of compounds analogous to vitamin E. [Also see Perspective by Nachtsheim] Authors: Muhammet Uyanik, Hiroki Hayashi, Kazuaki Ishihara

A mixed organic phase perovskite grown in mesoporous templates boosts solar cell stability. Authors: Anyi Mei, Xiong Li, Linfeng Liu, Zhiliang Ku, Tongfa Liu, Yaoguang Rong, Mi Xu, Min Hu, Jiangzhao Chen, Ying Yang, Michael Grätzel, Hongwei Han

Silicon-based metasurfaces can extend the range of planar optical devices. Authors: Dianmin Lin, Pengyu Fan, Erez Hasman, Mark L. Brongersma

A protocol is implemented that allows for fault-tolerant quantum computing. Authors: D. Nigg, M. Müller, E. A. Martinez, P. Schindler, M. Hennrich, T. Monz, M. A. Martin-Delgado, R. Blatt

Two bosonic rubidium atoms in coupled quantum wells are prepared in a symmetrical state and allowed to interfere. [Also see Perspective by Thompson and Lukin] Authors: A. M. Kaufman, B. J. Lester, C. M. Reynolds, M. L. Wall, M. Foss-Feig, K. R. A. Hazzard, A. M. Rey, C. A. Regal

Two closely spaced laser lines can be used for the generation of stable microwaves. Authors: Jiang Li, Xu Yi, Hansuek Lee, Scott A. Diddams, Kerry J. Vahala

Calsyntenin-dependent activation of insulin-PI3K signaling in the synaptic region governs associative learning. Authors: Hayao Ohno, Shinya Kato, Yasuki Naito, Hirofumi Kunitomo, Masahiro Tomioka, Yuichi Iino

Marine thermohaline circulation changed markedly during the mid-Pleistocene transition. Authors: Leopoldo D. Pena, Steven L. Goldstein

Mesoscale eddies transport as much ocean water as is moved by wind and thermohaline circulation. Authors: Zhengguang Zhang, Wei Wang, Bo Qiu

A limited set of interventions could disproportionately improve crop production and environmental sustainability. Authors: Paul C. West, James S. Gerber, Peder M. Engstrom, Nathaniel D. Mueller, Kate A. Brauman, Kimberly M. Carlson, Emily S. Cassidy, Matt Johnston, Graham K. MacDonald, Deepak K. Ray, Stefan Siebert

Alternative splicing of aminoacyl transfer RNA synthetases ablates the catalytic domain to yield diverse alternative functions. Authors: Wing-Sze Lo, Elisabeth Gardiner, Zhiwen Xu, Ching-Fun Lau, Feng Wang, Jie J. Zhou, John D. Mendlein, Leslie A. Nangle, Kyle P. Chiang, Xiang-Lei Yang, Kin-Fai Au, Wing Hung Wong, Min Guo, Mingjie Zhang, Paul Schimmel

A mitotic spindle midzone-associated Aurora B gradient monitors chromosome separation during cell division. [Also see Perspective by Hadders and Lens] Authors: Olga Afonso, Irina Matos, António J. Pereira, Paulo Aguiar, Michael A. Lampson, Helder Maiato

Single-molecule studies reveal a mechanism to activate the molecular motor cytoplasmic dynein in a cargo-specific manner. [Also see Perspective by Allan] Authors: Richard J. McKenney, Walter Huynh, Marvin E. Tanenbaum, Gira Bhabha, Ronald D. Vale

A weekly roundup of information on newly offered instrumentation, apparatus, and laboratory materials of potential interest to researchers.

On this week's show: A new tech to alter genes in the wild and a roundup of stories from our daily news site.