Shiwan ge weishenme

2 ideas

1. Start from the child's everyday why

   Each entry opens with a question a child could ask about something already observed, such as the sky, the body, or a household machine, then answers with a single causal mechanism in a few paragraphs. Starting from the familiar gives the abstract principle something to attach to. The short, self-contained format lets a reader enter anywhere and still finish with one complete explanation.

2. Popular science references must be periodically rewritten

   Scientific knowledge changes, so an explanatory reference that stays fixed gradually teaches outdated or wrong answers. Across repeated revised editions, entries are corrected, added, or replaced to follow new findings and technologies. The reliability of a science reference depends on how often it is revised as well as on how accurate it was when first written.

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