Chemistry
Separating by Differences in Boiling Point: Distillation
Distillation heats a liquid mixture, sends the more volatile components off as vapor first, then cools that vapor back into liquid to separate what was mixed. We look at its histor
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Psychology
Role Theory: Core Principles for Understanding Human Behavior
Role Theory is one of the important approaches to understanding and explaining human behavior in the social sciences, particularly psychology. Its basic premise is that individuals
Information technology
Adding More Makes It Later: Brooks's Law
Why does adding people to a late software project often make it even later? This article covers the origin of Brooks's Law and the illusion hidden in the man-month, why adding peop
Journalism & communication
A Message That Strikes Like a Bullet: The Magic Bullet Theory
The Magic Bullet Theory is the view that media messages hit audiences directly, like bullets, and produce the same effect in everyone. We look at the age of propaganda that produce
Earth science
Understanding and Analyzing Earthquakes: How Can We Prepare?
Earthquakes are among the most unpredictable and destructive natural disasters. Originating within the Earth, earthquakes have caused immense loss of life and property throughout h
Psychology
Depression Treatment: Psychological Understanding and Practical Methods
Depression is emerging as an important issue in society, and many people suffer from this condition. Depression is a serious illness that goes beyond a simple low mood, involves ps
Robotics
The Easy Things Are the Hardest: Moravec's Paradox
Why can computers beat chess champions yet struggle to pick up a cup? This article covers the origins of Moravec's paradox, its evolutionary explanation, examples from robotics, an
Economics
Putting a Price on the Harm: Pigouvian Tax
A Pigouvian tax charges an activity that harms others a tax equal to that harm, so market prices reflect the true social cost. Learn about externalities, how the tax corrects the m
Physics
Exploring Black Holes: New Discoveries Beyond the Edge of the Universe
Black holes are among the most mysterious objects in the universe. This article looks at how they form, from dying massive stars to the first stars after the Big Bang, traces the h
Economics
Strategies for Successful Stock Investing in Korea: Practical Experience and Lessons
The Korean stock market is constantly changing in response to global economic trends and domestic political changes, and the pace and patterns of these changes are becoming increas
Psychology
One Now or Two Later? The Stanford Marshmallow Experiment
The Stanford Marshmallow Experiment studied self-control by asking young children to choose between one treat now and two treats later. This article explains how the experiment wor
Food & nutrition
Lactic Acid Bacteria and a Healthy Daily Life: Keys to Immunity and Gut Health
Gut health and immunity are emerging as important aspects of health in modern life. Because much of our body's immune system begins in the gut, maintaining gut health is essential