Babbage: A flicker of light for Alzheimer’s

After almost two decades, the FDA has granted conditional approval to a drug for the treatment of Alzheimer’ disease, called aducanumab. But the new drug, and its approval, is surrounded by controversy. Will the gamble pay off? Also, a clever upgrade to fog-collecting technology which could provide a water source in remote locations. And, potentially life-saving oxygen enemas? Kenneth Cukier hosts 

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