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The biggest, brightest supernova ever seen – an exploding star 150 times the mass of the Sun – allows scientists to test an important theory at last. The grey short-tailed opossum is the first marsuipial to have its genome sequenced and there are surprises. Brazilian research into turning the greenhouse gas methane released by water reservoirs in warm countries into clean renewable energy. Work on Great Barrier Reef in Australia shows the link between coral diseases and rising sea temperatures. Plus, the areodynamics of pterosaurs, the giant flying reptiles with wingspans of up to 12 metres which lived 220-65 million years ago.