According to a report by a UN special rapporteur, “There is not one region in the world, not one historical period, that has not seen mass graves.” They are present on every inhabited continent and the number of victims they are believed to contain is staggering. Yet they are often hidden, denying families justice and peace.

Now, a team of academics from Bournemouth University is creating the world’s first open-source digital map of mass graves. In our latest Insights long read, the two experts leading the project explain how they hope it will help families find justice, and lead prosecutors to war criminals.

A recent study has found that nighttime light pollution may significantly increase the risk of developing Alzheimer’s disease, so we’ve teamed up with a neuroscientist to examine the findings.

And The Big Butterfly Count has reported its worst results in 14 years of monitoring UK species. An expert in animal ecology explains why.

Paul Keaveny

Investigations Editor, Insights

Crosses mark graves at a mass burial site in a forest on the outskirts of the city of Izium, Ukraine, on July 27, 2024. Matthew Rodier/Sipa US/Alamy

How the world’s first open-source digital map of mass graves could help bring justice to victims in Ukraine and other war zones

Ellie Smith, Bournemouth University; Melanie Klinkner, Bournemouth University

‘An underground map of atrocity that stretches across the planet’s surface’.

Light pollution has been linked with numerous health problems. AaronChenPS2/ Shutterstock

Why light pollution may be linked to greater risk of Alzheimer’s disease

Rahul Sidhu, University of Sheffield

Light pollution was more strongly correlated with Alzheimer’s disease than some other well-known risk factors.

Small tortoiseshell butterflies had their worst year on record. HWall/Shutterstock

For many in the UK, 2024 was the year without a butterfly

Lars B. Pettersson, Lund University

The Big Butterfly Count reported its worst results in 14 years of monitoring UK species.

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