the knowledge hub
Byte-sized articles to sharpen your mind
Short pieces that teach one thing properly, for students and for the parents and teachers reading over their shoulder.
Fun explanations of how the world works.
- 3 min readsample
Why the sky is blue and sunsets are not
Air scatters short wavelengths far more strongly than long ones, which is why overhead light reaches you blue. At sunset that same light travels through so much more air that the blue is scattered away before it arrives.
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What actually happens when bread rises
Yeast is a living fungus that eats sugar and breathes out carbon dioxide, and dough is elastic enough to trap the gas. Everything about a loaf's texture follows from those two facts.
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