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New research from McMaster University suggests the pandemic has created a paradox where mental health has become both a motivator for and a barrier to physical activity.

Scientists are using weather forecasts to predict the location and scale of impending meningitis outbreaks in sub-Saharan Africa.

When winter storms threaten to make travel dangerous, people often turn to salt, spreading it liberally over highways, streets and sidewalks to melt snow and ice. 

Respiratory disease increased markedly following one of Iceland’s largest volcanic eruptions, a new study has found.

Nitrogen is an element basic for life — plants need it, animals need it, it’s in our DNA — but when there’s too much nitrogen in the environment, things can go haywire.