We already know about the damaging effects of air pollution on our lungs, brain, and health. But new research has found that long-term exposure to air pollution might also be making us less intelligent – and elderly men and the less educated are the most at risk. Barbara Maher explains the dangerous nanoparticles that have also been linked to dementia. It makes the case for cutting down air pollution all the more compelling.

Radium, the chemical element that is so radioactive it gives off a pale blue glow, stunned the world when it was first isolated and described by chemist Marie Curie in December 1898. Her discovery earned her a Nobel Prize and started a craze in which (highly toxic) Radium found its way into soap, make up and even chocolate. Today Stephen Mansell remembers Curie and her invaluable contribution to science for its role in the first cancer treatments.

Trophy hunting has few advocates outside the world of hunting as many believe it’s a cruel waste of precious species that are already threatened. While a recent letter signed by celebrities and politicians called for wildlife trophy imports to be banned in the UK, Niki Rust argues that we need to think more carefully about the bigger threats to biodiversity, like habitat loss and climate change.

And after months of delay, the Home office finally published its vision for the UK’s post-Brexit immigration system yesterday. Emma Carmel looks at the proposals in the new white paper and finds them surreal and cynical.

All the best.

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