A cubic centimeter of the graphene aerogel weighs just 0.16 milligrams -- or, if you're having a problem conceptualizing that, a cubic meter weighs just 160 grams (5.6 ounces).

Ask bacteria where they’d like to live, and they’ll answer: a kitchen sponge, please. Sponges are microbe paradises, capable of housing 54 billion bacteria per cubic centimeter. In addition to ...