Heat waves becoming more frequent, deadly, study finds

The risk of fatal heat waves has risen sharply over the past 20 years, and such extreme weather will become more frequent in the future, increasing heat-related excess mortality, a study shows. The study, published in the journal Nature Communications, found that

COVID: should we start wearing masks again?

COVID Evolution and Variants: One thing that can be guaranteed about COVID is that evolution will provide us with a more or less constant stream of new coronavirus variants, some of which will be more successful at infecting people. Talk of mutations

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