Humans spend about 80% of their time indoors, but keeping track of the air we breathe usually requires expensive lab-grade ...

A lens-free system produces sharp mid-infrared images even in low light and over long distances, creating new opportunities for improved night vision, industrial inspections, and environmental ...

Planet or Plastic? is National Geographic’s multiyear effort to raise awareness about the global plastic trash crisis. Come to this page often to learn more, and find out what you can do to reduce ...