By Damien Carrington | The Guardian | September 30, 2014 The number of wild animals on Earth has halved in the past 40 years, according to a new analysis. Creatures across land, rivers and the seas are being decimated as humans kill them for food in unsustainable numbers, while polluting or destroying their habitats, the research … Continue reading Earth has lost half of its wildlife in the past 40 years, says WWF