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Latest Hans Spemann Stories

2011-07-20 16:34:25

How is it that a disc-like cluster of cells transforms within the first month of pregnancy into an elongated embryo?

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2008-06-26 13:50:00

More than 80 years have passed since the German scientist Hans Spemann conducted his famous experiment that laid the foundations for the field of embryonic development. After dividing a salamander embryo in half, Spemann noticed that one half – specifically, the half that gives rise to the salamander's 'belly' (ventral) starts to wither away.


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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