Another possibility that I recently heard about that might help
increase our L/D: It seems that marine mammals may shed microscopic
amounts of their skin as the swim, disrupting the normal boundary
layer turbulence. I guess a whale that uses Head & Shoulders Shampoo
will not swim as fast as the others?

Anyone else hear of this theory? Or think I was being ribbed? Or have
any thoughts on how it might be used in sailplane wing designs?

Martin