High above southwest Pennsylvania, it’s not unusual to look up and spot a bald eagle flying thousands of feet in the sky, on the hunt for prey. What’s especially surprising is that its nest isn’t in a secluded forest; it’s in the industrial heart of Pittsburgh, in a neighborhood called Hays…”Cities have lost a lot of biodiversity, but they support a lot more than we normally expect them to,” agrees Myla Aronson, a visiting professor of ecology at Rutgers University in New Jersey. She and several other researchers around the world recently published a comprehensive study that found while urbanization does decrease the abundance of plants and animals, the mixture of species continues to resemble the mix of the region.