In Niger, there's a crisis developing that could destabilise the whole of West Africa. Scientists reckon that humans have affected the planet so much that a new one is called for. And deep in a lake, they've found the telltale spot to prove it.
Following years of military takeovers in the region, Niger is the West’s last solid ally in the Sahel. But with this coup, and growing alignment with Russia, these relations are in jeopardy. Why is a policy to decongest London proving such a politically divisive issue (10:49)? And, a deep dive into a Canadian lake shows that humanity may be entering a new epoch (17:01).
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