Spider bones

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Big is different

We drag Physics into Halloween.

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Fear of the dark

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What’s scary?

We ponder plastic skeletons and other seasonal paraphernalia.

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Know thyself

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Learning and testing

Constructing a useful test can be very difficult.

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In praise of mediocrity

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Home entertainment

When you can get world-class entertainment at the touch of a button, why would you do it yourself?

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Changing the world, or not

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Recording sight and sound

Some inventions change society; others don’t.  Why?

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When there are two truths

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Aristotle vs. Ptolemy

We point out an uneasy tension beneath an apparent unity.

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A simpler theory

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Measuring complications

A simple idea can become a complicated thing to implement.

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Getting back to it

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Restarting routine

After a pause, how do you go back to what you used to do–and why?

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Future puzzles

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When today is past

What will need to be explained to future readers about today’s literature?

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The language of philosophy

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Words and ideas

Does the language you speak determine the way you think?

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