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Glossary Term
Permafrost Melting: How Thawing Ground Fuels Climate Change
Permafrost thaw is the warming and decomposition of ground frozen for at least two years, releasing stored carbon as the ice binding soil,...
Lamarckian Evolution: The Theory That Refuses to Die
Lamarckian evolution proposes that organisms pass traits acquired during their lifetimes to offspring. Epigenetic research has revived aspects of the idea.
Urban Heat Island Effect: Why Cities Run Hotter
The urban heat island effect is the measurable temperature difference between built-up urban areas and surrounding rural land, driven by heat-absorbing surfaces.
Yield Gap in Agriculture: Why Farms Produce Half Their Potential
The yield gap is the difference between the crop yield farmers harvest and the maximum their land could produce under optimal conditions.
Rayleigh Scattering: Why the Sky Is Blue and Sunsets Are Red
Rayleigh scattering is the elastic scattering of light by molecules smaller than its wavelength, explaining blue skies, red sunsets, and fiber-optic signal loss.
Quaternary Ice Age: Why Earth Is Still in an Ice Age
The Quaternary Ice Age is the current geological interval of repeated glacial and interglacial cycles, beginning 2.58 million years ago.
Supernova Remnant: How Exploding Stars Shape the Galaxy
A supernova remnant is the expanding structure of gas, dust, and shock waves left behind after a star explodes, shaping the galaxy through...
Paleomagnetic Dating Methods: How Rocks Record Earth's Magnetic History
Paleomagnetic dating determines the age of rocks and sediments by measuring the magnetic signatures they acquired when they formed, matching polarity patterns to...
Metamaterial Cloaking Technology: The Science of Invisibility
Metamaterial cloaking technology uses engineered materials to guide electromagnetic waves around objects, rendering them undetectable. From the 2006 first cloak to current research.
Jet Streams: How High-Altitude Winds Shape Weather
Jet streams are narrow bands of fast-moving wind in Earth's upper atmosphere, flowing west to east near the tropopause, steering weather systems and...
