The Sun (2008)The birds are large enough that they will retain heat, and resting the meat improves its tenderness. Times, Sunday Times (2014)In hot countries, metal structures can retain heat and burn the plants that are growing on them. Times, Sunday Times (2012)A mill retains its original interior shape. Times, Sunday Times (2016)Wholesale energy prices have risen because of the weak pound and partial recovery in oil prices. Times, Sunday Times (2016)Surprisingly, studies are showing that they can actually help…