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Feathers from Scales
The following ref brings some interesting data to the "where did
feathers come from" debate.
Zou, H., & Niswander, L. (1996). Requirement for BMP signaling
in interdigital apoptosis and scale formation.
Science, V. 272, pp. 738-741.
The authors were able to experimentally manipulate the leg scales
on chickens so that they were transformed into feathers, fully consistent
with the idea that feathers are modified scales.
Dept. of PEHR
Western Washington University
Bellingham, WA 98225