Citizen scientists work at the frontline of climate change research

A ?citizen scientist? network called Project BudBurst uses everyday observers to collect climate change data related to the leafing and flowering of flora across the United States. Armed with a Web site and thousands of participants, the project notes early flowering trends and other anomalies, which one environmentalist says are a symptom of “global weirding.? Guest: Project BudBurst co-founder Kayri Havens. Havens is the director of plant science and conservation at the Chicago Botanic Garden.