Sources: Mariota to miss time with MCL sprain

Commanders quarterback Marcus Mariota suffered a sprained MCL that is likely to sideline him for the remainder of the preseason, sources told ESPN.

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Wildfire smoke now bigger prenatal threat than human sources of air pollution

Regulations reduced prenatal exposure to harmful emissions, but wildfire smoke is erasing gains.

Brief by WorldPing · Original reporting by Ars Technica