EarthPolar bears waste lots of their energy and it could be a problem We thought polar bears had neat tricks for conserving energy in lean periods, but it turns out they are not that thrifty, which could cause them trouble in the future News
EarthOur lust for tastier chocolate has transformed the cocoa tree Ever since we domesticated the cocoa tree over 3000 years ago, we have been breeding them to make tastier chocolate – but in the process we have made them vulnerable News