Yared Nuguse never dreamed of being a professional runner, let alone an Olympic medalist. Aged 14, his sporting achievements ...

The original observations were from 2011, and were possible because this pair of objects passed in front of a more distant star, slightly magnifying it like a glass lens. This is the microlensing ...

For a teenage Nuguse, “scrawny” and with little care for sports, the idea that he would one day become an elite middle-distance athlete – and among the best in the world, no less – was ...