Chopping down the rain forest can harm animals such as toucans, golden lion tamarind monkeys and poison dart frogs. Now, add another species to the list – humans. Deforestation in the Brazilian Amazon can lead to malaria epidemics years later, according to a new study from the University of Wisconsin-Madison. The work “points out how tropical forest conservation can be important for human health,” said UW-Madison epidemiologist Sarah Olson, lead author of the study.