Scientists Say

A weekly word defined, in a sentence and in context.

  1. Brain

    Scientists Say: Cognition

    Cognition is involved in all conscious mental activity, from thinking and reasoning to remembering.

    By
  2. Earth

    Scientists Say: Humidity

    Feel sticky when you step outside on a summer day? Blame humidity — water in the air.

    By
  3. Genetics

    Scientists Say: DNA

    Short for deoxyribonucleic acid, DNA is the molecule that determines how each living thing looks and works.

    By
  4. Psychology

    Scientists Say: Trauma

    No one experiences trauma the same way. Its effects can be physical or emotional. Immediate or delayed. Brief or long-lasting.

    By
  5. Chemistry

    Scientists Say: Pigment

    From fruits to fur to fine art, many materials get their colors from compounds called pigments.

    By
  6. Physics

    Scientists Say: Proton

    These positively charged particles are important building blocks in atoms.

    By
  7. Planets

    Scientists Say: Habitable Zone

    The habitable zone is the region around a star where temperatures could be right for worlds to host liquid water.

    By
  8. Computing

    Scientists Say: Supercomputer

    These ultrafast computers perform complex calculations for research on cancer, quantum physics and more.

    By
  9. Tech

    Scientists Say: Virtual reality

    Virtual reality is an immersive, 3-D artificial environment created by a computer.

    By
  10. Earth

    Scientists Say: Fault

    A fault is a crack in Earth’s crust where pieces of rock scrape past each other.

    By
  11. Humans

    Scientists Say: Denisovan

    The Denisovans were a recently discovered population of ancient hominids.

    By
  12. Physics

    Scientists Say: Inertia

    Inertia is the tendency of objects to resist changes in their motion.

    By