Fighting climate change: Saving the world from catastrophe
West African storytellers still sing the praises of Sunjata Keita today. Crippled as a child, he overcame his disability to unify the fragmented kingdoms of the region, creating the vast medieval Mali Empire.
US space agency NASA is launching a follow-on mission called GRACE-FO to investigate how much water there is on and under Earth's surface. Twin satellites will use high-precision gravity measurements to monitor the movements of our planet's water.
Biodiversity is under threat from development and climate change. Yet much of the planet's biodiversity isn't even known to science yet. Conservationists still struggle to find out what's really out there.
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