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A new blood test for Alzheimer's appears to be able to spot the disease up to ten years before symptoms develop. It's hoped it could lead to earlier treatment and slow progression of the disease, giving patients better quality of life for longer. Also: The 50-year-old X Games champion, Andy MacDonald, who's aiming to outdo the teenagers in Olympic skateboarding. How Platypus Rescue HQ is hoping to help the animals make more babies, called puggles. Why a travel blogger in Germany woke up to dozens of messages from students in China. And, in a country famous for its food, what's on the menu for Olympic and Paralympic athletes?Our weekly collection of happy stories and positive news from around the world.