When thousands of crabs mysteriously washed up on beaches in north-east England three years ago, many blamed a toxic industrial chemical called pyridine thought to have been released from contaminated marine sediments by dredging in Teesside port. Politicians debated, academics disagreed and some reporters suggested a cover-up. But nobody could actually confirm the culprit with any degree of certainty.

As with all science, gathering accurate evidence and rigorously analysing it takes time. Now three of the scientists who were part of the independent panel that reviewed the evidence for the government have produced a study outlining why the case for pyridine as the cause of the crab deaths was unfounded. Here, they explain the evidence – and push back against those who questioned their independence and integrity in favour of a conspiracy theory.

I was moved by this article on Anna Narinskaya’s play The Last Word, which gives a platform to the voices of nine women who have fallen foul of the Russian legal system. Julie Curtis, professor of Russian literature at the University of Oxford, gives us her view on what makes the play so powerful.

And it seems surgeons mistakenly remove the wrong body part or leave a foreign object inside a patient surprisingly often. Here’s how it happens.

All the best.

Anna Turns

Senior Environment Editor

Dead crabs washed up on Teesside. Environment Agency

A toxic chemical was blamed for killing thousands of Teesside crabs – but our study explains why pyridine wasn’t the culprit

Alex Ford, University of Portsmouth; Crispin Halsall, Lancaster University; Mark Fizsimons, University of Plymouth

Scientists who took part in an independent inquiry that refuted the ‘pyridine hypothesis’ faced widespread criticism and distrust from politicians and the media

The Last Word at the Marylebone Theatre. Ute Langkafel/MAIFOTO

The Last Word: ‘painfully poignant’ play gives a voice to women silenced by Russia’s legal system

Julie Curtis, University of Oxford

The Last Word focuses on the sheer absurdity of putting women on trial for daring to speak out. The women’s speeches are all verbatim transcripts, spoken by one actress.

Aaron Amat / Alamy Stock Photo

Operating on the wrong body part – what can be done to prevent it?

Adam Taylor, Lancaster University

One woman had an ovary removed instead of her appendix. Hundreds of these ‘never events’ occur annually.

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