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As extreme heat returns to much of the world we hear the impact of last year鈥檚 heatwaves in Europe, where 62,000 people are estimated to have died. Joan Ballester, Associate Research Professor at Barcelona Institute for Global Health, discusses the figures from his latest paper and his concerns for the future.

This week the European Court of Human Rights ruled in favour of middle-distance runner and Olympic champion Caster Semenya in a case related to testosterone levels in female athletes. Marnie Chesterton speaks to developmental biologist Dr Emma Hilton about what causes differences in sexual development and the impact they can have.

Also, Kew Gardens is going digital. Millions of specimens are being made available to the world for the first time in an enormous digitisation project. Ella Hubber goes behind the scenes at Kew to see some of the precious specimens.

Finally, the Indonesian government has banned a group of foreign scientists from conducting conservation research. Bill Laurance, Research Professor at James Cook University, talks to Science in Action about keeping politics out of conservation science.

Image credit: Getty Images

Presenter: Roland Pease
Producer: Ella Hubber