Faced with a gritty landscape of metal fences, concrete walls and asphalt pavement, city lizards in Puerto Rico rapidly and repeatedly evolved better tolerance for heat than their forest counterparts, according to new research. Studies that delve into how animals adapt in urban environments are still relatively rare. But anoles are becoming a model system for urban evolutionary research. Continue Reading... Use this thread to discuss the article above. What are your thoughts about Hot time in the city: Urban lizards evolve heat tolerance?