Scientists Say
A weekly word defined, in a sentence and in context. Click here to find the alphabetized list.
- Chemistry
Scientists Say: Fluorescence
This property causes materials — including some animals’ skin, fur or feathers — to glow under light.
- Brain
Scientists Say: Glymphatic System
The glymphatic system bathes the brain in cleansing fluids during sleep and clears away harmful cellular waste.
- Math
Scientists 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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- Physics
Scientists Say: Neutron
Neutrons are one of the main building blocks of atoms and have no electric charge.
- Earth
Scientists Say: Pole
A pole is either of two opposite ends of a molecule, magnet, battery, planet or other object.
- Life
Scientists Say: Fruit
Some foods usually called vegetables — such as tomatoes, cucumbers and peppers — are actually fruits.
- Health & Medicine
Scientists Say: Liver
This organ in the upper-right side of the belly does many essential jobs, such as cleaning blood and producing bile.
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- Space
Scientists Say: Telescope
Almost everything we know about the universe around us, we know thanks to telescopes.
- Life
Scientists Say: Fungi
Although some fungi can cause diseases, others can be eaten, used to make medicines or serve other useful functions.
- Physics
Scientists Say: Force
When an object experiences a force, its change in motion — or acceleration — depends on its mass.
