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2005-02-13 11:05:00

If it's pretty easy to spot different species in the human-scale part of the plant and animal kingdoms. But a new study shows that species differences aren't so clear, at least as currently measured, when it comes to microscopic bacteria.


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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