Really tiny bits of matter, smaller than a billionth of a meter.
Scientists use nanoparticles to make better medicines.
科学者はナノ粒子を使ってより良い薬を作ります。
These super small particles have special abilities and are in many things we use every day.
People are learning more about how nanoparticles might affect our health.
人々はナノ粒子が私たちの健康にどのように影響するかについてより多くを学んでいます。