Why is the sky blue? The real answer is weirder than you think
The sky isn't actually blue the way you think. The real physics of Rayleigh scattering, why your eyes ignore violet, and what color the sky is on Mars.
Posts by Ty Sutherland
Black holes are not cosmic vacuum cleaners. They are objects so dense that nothing, not even light, can escape. Here is what they actually are, how we photograph them, and what the latest science...
A penny that doubles every day becomes over $5 million in 30 days. Compound interest is the mathematical force behind wealth building. Here is how it works, why time matters more than amount, and how...
In 1602, the Dutch East India Company did something no business had done before: it invited ordinary citizens to buy ownership shares in a commercial enterprise. A total of 1,143 investors...
The Rule of 72: the mental math trick that reveals compound growth
In This Article What Is the Rule of 72? How Accurate Is This Shortcut? Why Does 72 Work So Well? Practical Applications Beyond Investing Advanced Applications Common Mistakes to Avoid Beyond...
The Pythagorean theorem: the most useful triangle trick ever
In This Article The Visual Truth Behind a² + b² = c² Why This Triangle Trick Rules the World A Real Example That Makes It Click The Theorem's Ancient Origins Beyond Basic Triangles Common...