Scientists Say
A weekly word defined, in a sentence and in context. Click here to find the alphabetized list.
- Earth
Scientists Say: Lava bomb
An explosive volcanic eruption can shoot a blob of lava into the air. As that blob travels, it cools, creating a dangerous lava bomb.
- Life
Scientists Say: Chimera
What does it mean to be an individual? The genetic mashups called chimeras might challenge your assumptions.
- Planets
Scientists Say: Regolith
This sandlike dust blankets planets, asteroids and other rocky surfaces of our solar system, including our own planet.
- Brain
Scientists Say: Aphantasia
Not everyone has a “mind’s eye,” and that’s OK. Some people recall memories and process information in different ways altogether.
- Earth
Scientists Say: Frost Quake
When wet soil abruptly freezes, it creates high pressure underground. When the pressure releases, it can trigger a mini-earthquake called a frost quake.
- Brain
Scientists Say: Dopamine
This brain chemical helps focus our attention and plan our path toward success.
- Life
Scientists Say: Organoid
Lab-grown organ models mimic the functions of real organs and may open doors to a future of personalized medical care.
- Earth
Scientists Say: Sundog
A sundog appears in the sky when sunlight shines through tiny ice crystals suspended in the air.
- Chemistry
Scientists Say: Rocket propellants
Rockets need more than fuel to get where they need to go — they also need oxidizers to burn that fuel. Together, these chemical combos are known as rocket propellants.
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- Materials Science
Scientists Say: Quantum dot
Quantum dots are nanosized specks whose properties are governed by the strange rules of quantum physics.
- Planets
Scientists Say: Theia
Clues about this ancient protoplanet's catastrophic end may have been entombed in Earth's lower mantle for billions of years.
