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அனைத்துக் கட்டுரைகளும்

Plain-language explainers on science, space, technology, nature, the human body, facts and money.

Science

Why Is the Sky Blue?
வானம் ஏன் நீல நிறமாகத் தெரிகிறது?
Sunlight looks white, yet the daytime sky is blue. The answer lies in how air scatters different colours of light.
2 min read

Space

How Does the Solar System Work?
சூரியக் குடும்பம் எப்படி இயங்குகிறது?
A friendly tour of the Sun, its eight planets and the invisible pull that keeps them all in orbit.
3 min read
How Rockets Reach Orbit
ராக்கெட்டுகள் சுற்றுப்பாதையை எப்படி அடைகின்றன?
Reaching orbit is less about going up and more about going sideways very fast. Here is how rockets manage it.
3 min read
What Is a Black Hole?
கருந்துளை என்றால் என்ன?
A black hole is a place where gravity is so strong that not even light can escape. Here is what that means, and what it doesn't.
3 min read

Technology

How EV Batteries Store Energy
மின்சார வாகன பேட்டரிகள் ஆற்றலை எப்படிச் சேமிக்கின்றன?
An electric car's battery is a pack of many small cells. Here is how they hold energy, and why driving range varies.
3 min read
How Does Wi-Fi Pass Through Walls?
வைஃபை சுவர்களைக் கடந்து எப்படிச் செல்கிறது?
Wi-Fi uses radio waves, which can pass through many walls but not all of them. Here is why, and how to get a better signal.
2 min read

Nature

How Rainforests Make Their Own Rain
மழைக்காடுகள் தங்களுக்கான மழையை எப்படி உருவாக்குகின்றன?
Rainforests don't just receive rain, they help to create it. Here is how trees return water to the air.
2 min read

Human Body

How Your Heart Pumps Blood
உங்கள் இதயம் இரத்தத்தை எப்படிச் செலுத்துகிறது?
Your heart is a muscle that never takes a break. Here is how its four chambers and valves keep blood moving around your body.
2 min read

Interesting Facts

Why Do We Have Leap Years?
லீப் ஆண்டு ஏன் வருகிறது?
A year is not exactly 365 days. Leap years are how the calendar stays in step with the seasons.
2 min read

Markets

Why Gold Holds Its Value
தங்கம் ஏன் தன் மதிப்பைத் தக்கவைக்கிறது?
Gold has been treasured for thousands of years. Here is why people trust it, and why 'holds its value' does not mean 'never falls'.
2 min read
What a Stock Index Really Measures
பங்குச் சந்தைக் குறியீடு உண்மையில் எதை அளக்கிறது?
A stock index turns the movements of many company shares into a single number. Here is what that number does, and does not, tell you.
2 min read
What Moves the Stock Market Each Day?
பங்குச் சந்தை தினமும் ஏன் ஏறி இறங்குகிறது?
Interest rates, company results and global news — the forces behind daily price moves, explained simply.
3 min read