Scientist's Notebook

Some people complain about invasive species. Other people take action. Ecologist Todd Campbell of the University of Tampa has started a campaign against a species of lizard called the Nile monitor. Originally from Africa, Nile monitors have invaded Florida and are eating everything in sight. Campbell answered a few questions about what he's doing to help stop the reptile invasion.—E. Sohn

Why did you decide to study Nile monitors?

They're big and interesting. But, more importantly, I saw t...

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