Where does dust come from? Scientists in Arizona are reporting a surprising answer to that question, which has puzzled and perplexed generations of men and women confronted with layers of dust on furniture and floors. Intro theme and music by Kevin MacLeod. Creative Commons licensed audio from freesound.iua.upf.edu.

Promoting Public Health: Dusting off a hidden challenge

Taking inspiration from trees, scientists have developed a battery made from a sliver of wood coated with tin that shows promise for becoming a tiny, long-lasting, efficient and environmentally friendly energy source. Their report on the device — 1,000 times thinner than a sheet of paper — appears in the journal Nano Letters.

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Promoting Public Health: Dusting off a hidden challenge

Promoting Public Health: Dusting off a hidden challenge