Editor's note

Russia's Ambassador to the United Nations, Vitaly Churkin, died suddenly of a heart attack yesterday. Tributes have poured in for Churkin, who was a well-respected diplomat despite his frequent clashes with rival powers on the floor of the United Nations.

While he was responsible for defending Russia's veto of a proposed inquiry into the downing of flight MH17, Churkin nonetheless committed to a genuine inquiry. Jan Lemnitzer writes that an obscure precedent from 1905 might help honour that promise to the families of the 298 people who died that day.

Megan Clement

Deputy Global Editor

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The story that refuses to go away. Michael Kooren/Reuters

Churkin's promise: why the solution to the MH17 case may lie with a forgotten legal precedent from 1905

Jan Lemnitzer, University of Southern Denmark

An adversarial international commission of inquiry, similar to one instituted to resolve a dispute between Britain and Russia in 1905, could break the deadlock over the downed flight.

Science + Technology

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Environment + Energy

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    Emily Shuckburgh, University of Cambridge; Charles Kennel, University of California, San Diego; Chris Rapley, UCL; David Victor, University of California, San Diego; Stephen Briggs, UCL

    We need international agreement on a set of Earth's 'vital signs' and how to measure them.

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    Marjolaine Krug, Council for Scientific and Industrial Research

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Politics + Society