Venezuelan opposition leader María Corina Machado spoke in Norway, a day after the US seized an oil tank off the coast of her country, upping pressure on the ruling government. Follow for live updates ...

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If an airline does not have sufficient personnel, its slotted flights should be reduced and transferred to other carriers ...

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Mechanical ventilation saves lives, but the airflow it produces inside an intubated airway can also shape conditions linked ...

A global effort to better understand moisture-laden rivers in the sky, like those currently battering the West Coast, will ...

Mechanical ventilation saves lives, but the airflow it produces inside an intubated airway can also shape conditions linked ...

Alveolar macrophages are immune cells that live in the tiny air sacs of the lungs. Under normal conditions, these cells act ...

These ghostly hoops have been spotted above volcanic events around the world. But how they form has long been a mystery.

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