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Latest Jennifer Clack Stories

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2009-07-07 06:45:00

Nearly everyone can recall the high school textbook illustrations of the planet’s first land-dwelling creatures, ubiquitously represented as comic-looking fish with short, stumpy legs.

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2009-04-18 14:00:00

New research from Duke University suggests a reversal in the order in which two four-limbed creatures transitioned from water to land.


Word of the Day
pawl
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.
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