Times (UK): A series of fossilised forests the size of small cities have provided prehistoric evidence of how tropical rainforests are destroyed by global warming. The fossil remains represent the first rainforests grown on the planet and their demise more than 300million years ago ‘points to the future’ of the modern-day Amazon. Six petrified forests, dating from 303.9 million to 309 million years ago, have been discovered in coalmines in the United States. Because they straddle a period …