For the greater part of a decade, Louise Chapman has dedicated herself to trapping moles in the English county of Norfolk: "To catch a mole, I have to think like a mole." Video: Niki Blasina.

Perform Monthly Self-Checks – Know your moles, track changes. •Get Annual Skin Exams – Dermatologists can catch what you might miss. •Use SPF>30 Sunscreen Daily – Sun protection prevents ...