“A Little Bird Told Me” … Happy Birthday Charles Darwin
10,000 Birds
FEBRUARY 16, 2012
Variation in finch beak shape is constantly arising due to the usual sources of genetic variation, and that variation is then culled across generational time, but which direction the culling happens in depends on the climate of that particular year or season. Thus, to the Grants, a dead finch is a very important piece of data.
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