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Charles Darwin publishes his final letter to Nature , on the dispersal of freshwater bivalves

If you need an air purifier for travel, you may want to look for a purifier that boasts a minimum clean air delivery rate (CADR) of 217representing efficiency and airflowsuitable for an average hotel room size of about 325 square feet

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Claims that smoking increased in parts of Canada after the display ban are wrong, Hammond says

Many older adults spend years or even decades living with preventable disability, breathlessness, chronic pain, limited mobility, and loss of independence attributable to smoking