Back-to-school season means head lice can make an unwelcome return. Lauren Salzberg, the ‘Lice Lady’ from Gaithersburg, joined us with pro tips on how to prevent, spot, and treat lice—plus the best ...

Any evidence of lice was once a reason for immediate dismissal from school, not to return until the student's head was ...

The soaring price of gold is fueling a "mercury boom" in central Mexico. A surge in the demand for the toxic metal, which is ...