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- Walt Whitman

A noiseless patient spider,

I mark'd where on a little promontory it stood isolated,

Mark'd how to explore the vacant vast surrounding,

It launch'd forth filament, filament, filament, out of itself,

...

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noun

A polynomial or function with exactly two variables.

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Chapter 4 of 10

Variation: Nature's Raw Material

2 min read

Darwin's finches with different beak shapes
Different beak shapes can help birds use different foods. Variation gives selection something to work with.

Chapter 4

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