The Silent Killer Called PM2.5 / Beyond the Headlines / Science Note: Toad Mimics Venomous Snake / Cosmic Crisp Apples / Brewing a Specialty Coffee Market / A Typical Carbon Footprint of Thanksgiving / Reflections on the Native American Tradition of Giving Thanks / Cranberries Take Center Stage The fine particulate air pollution known as PM2.5 has been shown to be deadly with correlation to heart attacks and strokes, and a new study links it with three more specific causes of death: dementia, kidney disease, and hypertension.

Also, Thanksgiving is a time for American families and friends to gather and be thankful, but for Native Americans it can also be a reminder of the displacement, violence and disease brought by the white colonists.

And coffee is no longer simply a drink to wake you up as there is now a sizable market for specialty coffees with unique flavors. To link up coffee growers with that market and ensure they get a fair price, a Portland, Oregon-based nonprofit started a coffee tasting "cupping" and auction.

All that and more, this week on Living on Earth from PRI.

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