The Wonder Jar

The Wonder Jar at twilight in a mountain field-journal world, surrounded by pine branches, wildflowers, books, a lantern, compass, notebook, and glowing question slips.
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THIS WEEK’S WONDER

WONDER 034 • INDOOR

Why does metal feel colder than wood when both have been in the same room?

Cold can be a speed, not just a number: metal borrows warmth from your hand faster than wood can.

SOURCE REVIEWED • UNIVERSITY OF ILLINOIS PHYSICS VAN

A good question is already a result.

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