Editor's note

Oscar weekend is upon us and La La Land is strong favourite to win Best Picture. But there’s so much more to cinema than the Hollywood bubble, as the nominees for Best Foreign Language Film show. Still, there’s a significant absence in the category – the best Brazilian film of the year, which was not submitted to the Oscars for political reasons.

We’ve also brought you stories this week on the dolphins that make optimistic decisions, the discovery of a new solar system, and what we can all learn from the world’s most notorious drug king pin.

Megan Clement

Deputy Global Editor

Oscar weekend

Taraneh Alidousti and Shahab Hosseini in Iran’s The Salesman. Memento Films Distribution

Forget La La Land – best foreign language Oscar nominees show the true diversity of cinema

Pegah Shahbaz, Université Sorbonne Nouvelle, Paris 3 – USPC; Anders Marklund, Lund University; Kim Toft Hansen, Aalborg University; Lothar Mikos, Filmuniversität Babelsberg Konrad Wolf; Marc Tabani, Centre national de la recherche scientifique (CNRS)

The best of global cinema from Germany to Iran and Vanuatu.

The director and stars of ‘Aquarius’ protest the proposed impeachment of Brazilian president Dilma Rousseff at Cannes in May 2016. Jean-Paul Pelissier/Reuters

Political attacks on Brazilian film a reminder: there's no such thing as bad publicity

Rodrigo Fonseca, Darcy Ribeiro School of Cinema

By denying 'Aquarius' its chance at the Oscars, Brazil's government summoned memories of dictatorship-era censorship and brought the film unprecedented attention.

Hopeful dolphins

Swimming in synchrony is a fundamental social behaviour for dolphins and is thought to reinforce their bonds. Parc Astérix

Synchronised swimming makes dolphins more optimistic

Isabella Clegg, Université Paris 13 – USPC

A new study of captive dolphins has found that those engaging in synchronised swimming make more optimistic judgements about an unknown event.

A new solar system

Artist impression of the Trappist-1 System. Credit: ESO/M. Kornmesser/spaceengine.org

It's our Solar System in miniature, but could TRAPPIST-1 host another Earth?

Elizabeth Tasker, Japan Aerospace Exploration Agency (JAXA)

Scientists have discovered seven Earth-sized planets packed around a dim star.

Women in science

Female scientists are often more productive than their male colleagues but much less likely to be recognised for their work. Argonne National Laboratory/Wikimedia

Women aren't failing at science — science is failing women

Lorena Rivera León, United Nations University

Female scientists publish more and better research but are promoted less. New research from Mexico exposes gender gap in science there, and across the globe.

Learning from El Chapo

El Chapo after his arrest in January 2016. Thomas Bravo/Reuters

El Chapo, story of a kingpin — or why Trump's plan to defeat Mexican cartels is doomed to fail

Luis Gómez Romero, University of Wollongong

Joaquin Guzmán is Mexico’s worst 'bad hombre', but his extradition to the US won't stop the Sinaloa Cartel.

A solution to MH17

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.