Chemist Mostafa El-Sayed has received the National Medal of Science, the United States' highest science award, for his work on small compounds known as nanomaterials.
Nanotechnology, the science on the scale of atoms and molecules, is helping to clean wastewater and change how clean water is delivered to those who need it.
From small towns, to big, bright metropolitan areas in the United States, businesses, local governments, scientists and everyday people are developing innovations that are making people's lives healthier, easier, more prosperous or simply more interesting. Here is a sampling of the innovation hot spots in the United States.
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