CONSERVATION Keep cruise ships off remote reef in South Pacific rich in species p.372 PUBLISHING Use ORCID and DOIs more for frictionless communication p.372 HISTORY Maria Mitchell, pioneering astronomer and pithy pedagogue p.370 POLICY Conservation tries a new way to catalogue and synthesize research p.364 Four principles for synthesizing evidence Reward the creation of analyses for policymakers that are inclusive, rigorous, transparent and accessible, urge Christl A. Donnelly and colleagues. To improve vaccine uptake, nations can build on others' experience-if research is synthesized regularly and well.

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