Psychology
Tension Helps in the Right Amount: The Yerkes-Dodson Law
Too little tension and we drift; too much and our minds go blank. This article traces the Yerkes-Dodson Law from the original 1908 mouse experiment to the inverted-U curve, explain
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Earth science
Why Cities Run Hotter: The Urban Heat Island
An urban heat island is when a city runs warmer than the countryside around it. This piece covers Luke Howard’s early records in London, why pavement and buildings trap heat, how t
Robotics
The First Robot Arm to Enter the Factory: Unimate
Unimate, installed at a General Motors plant in New Jersey in 1961, is regarded as the world’s first industrial robot. Learn how it grew from George Devol’s patent, how its hydraul
Psychology
The Psychology of Anger: Understanding the Flames of Emotion
Anger is one of the most powerful and primal emotions humans can experience. This emotion is shaped in complex ways by biological, psychological, and social factors, and it affects
Economics
Market Equilibrium and Price Changes: The Core Principles of Supply and Demand
The basic concepts of supply and demand, how market equilibrium and the equilibrium price form, how price changes affect quantity demanded and supplied, what shifts the demand and
Earth science
The Sea's Red Warning - Causes of Red Tides and Response Strategies
Red waves that suddenly appear across a clear blue sea are more than a simple natural phenomenon: they are a red tide, which poses a major threat to marine ecosystems. Red tides ha
Psychology
Why Everyone Just Watches: The Bystander Effect
Why does help often arrive more slowly when more people are watching? This article covers the case and classic experiments that launched research on the bystander effect, the three
Tourism studies
A Shop That Sells Without Taxes: The Duty-Free Shop
A duty-free shop sells goods to travelers leaving the country without customs duties or value-added tax. This article covers how duty-free shops began, why they can drop taxes, the
Food & nutrition
The Temperature at Which Oil Starts to Smoke: Smoke Point
The smoke point is the temperature at which an oil or fat, when heated, begins to give off a continuous, visible bluish smoke. This article covers why oil smokes, what determines t
Education
The Belief That Ability Can Grow: Growth Mindset
A growth mindset is the belief that intelligence and talent can grow through effort, good strategies and help from others. We look at how it differs from a fixed mindset, the prais
Food & nutrition
Healthy Diet Planning: Effective Strategies and Practical Tips
Efficient meal planning is an important factor in maintaining health and improving physical fitness. In modern society, putting together a balanced diet amid busy schedules and cou
Food & nutrition
The Wisdom of Cooking Corn in Ash Water: Nixtamalization
Nixtamalization is a traditional Mesoamerican method of cooking and steeping dried corn in an alkaline solution such as limewater, then washing and hulling it. Learn its history, h