Scientists Say
A weekly word defined, in a sentence and in context.
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PhysicsScientists Say: Fusion
Nuclear fusion is the physics that powers the sun and could someday provide abundant clean energy on Earth.
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PhysicsScientists Say: Fission
Nuclear fission is the process of splitting atoms apart to release huge amounts of energy.
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ComputingScientists Say: Artificial intelligence
Artificial intelligence is technology smart enough to do tasks that would normally require human brainpower.
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Health & MedicineScientists Say: Infection
Infections range from mild illnesses, such as the common cold, to deadly diseases, such as rabies.
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ChemistryScientists Say: Fluorescence
This property causes materials — including some animals’ skin, fur or feathers — to glow under light.
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BrainScientists Say: Glymphatic System
The glymphatic system bathes the brain in cleansing fluids during sleep and clears away harmful cellular waste.
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MathScientists Say: Mean, median and mode
Mean, median and mode are all different ways to describe the middle value in a dataset.
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PhysicsScientists Say: Neutron
Neutrons are one of the main building blocks of atoms and have no electric charge.
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EarthScientists Say: Pole
A pole is either of two opposite ends of a molecule, magnet, battery, planet or other object.
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PlantsScientists Say: Fruit
Some foods usually called vegetables — such as tomatoes, cucumbers and peppers — are actually fruits.