Billionaire spends millions mapping mouse brains

WASHINGTON (Reuters) - So you're a billionaire and you've bought a couple of sports teams, launched an amateur space project and spent $800 million on good causes -- what do you do with the change? OTTAWA (Reuters) - Mona Lisa, the mysterious woman immortalized in Leonardo da Vinci's 16th century masterpiece, had just given birth to her second son when she sat for the painting, a French art expert said on Tuesday. GENEVA (Reuters) - Commercial fishing methods threaten to devastate Europe's oceans, WWF International said on Wednesday.