I saw a robin build a nest. The robin did not have to learn how to build a nest. It knew from the time it was born. This knowing is called instinct. Even if a robin never saw a nest, it would make…
Space is—emptiness. It is black because emptiness has no light of its own. It is neither cold nor hot because emptiness has no temperature. And, of course, there is no air or water in space. But…
> Abraham Lincoln in Washington, D.C. If you and I drew pictures of an airplane, our airplanes wouldn’t look the same at all. That’s because no two people draw the same thing in the same way. …
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