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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? This mechanism is a mystery that man has tried to unravel for millennia. The first significant step towards understanding the issue was made nearly a century ago in experiments conducted by the German embryologists Hans Spemann and Hilde Mangold. The two used early newt embryos and identified a group of cells within them which, upon transplantation, formed a two-headed...

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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. However, the other 'back' (dorsal) half that develops into its head, brain and spinal cord, continues to grow, regenerating the missing belly...


Word of the Day
maffling
  • To stammer.
  • Present participle of maffle, to stammer.
  • A simpleton.
The word 'maffle' may come from a Dutch word meaning 'to move the jaws' or a French word meaning 'having large cheeks'.