Anti-COVID drug may have led to virus mutations: study

An anti-COVID drug widely used across the world may have caused mutations in the virus, researchers said on Monday, but there was no evidence that the changes had led to more dangerous variants.

For kids on summer break, Canada's wildfire smoke hits hard

For many Canadian parents, the start of the summer holidays is turning into a headache, as thick wildfire smoke forces them to check air quality indices the same way they might normally check the weather forecast.

Southern US swelters in brutal heat wave

A dangerous and prolonged heat wave blanketed large parts of the southern United States on Tuesday, buckling highways and forcing people to shelter indoors in what scientists called a climate-change supercharged event.

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