Natures wonders: flying and swimming efficiency excellent (Introduction)

by David Turell , Monday, July 02, 2018, 14:51 (2334 days ago) @ Balance_Maintained

Study shows and swimming and flying are extremely efficient results of evolution:

https://phys.org/news/2018-06-evolution-efficient-airfoils.html

"Swimming and flying animals are optimally adapted for cruising through their environments, producing thrust via propulsors—wings for birds and caudal fins for fish. Over millions of years, the morphology of these animals evolved for maximally efficient cruising, and about 30 years ago, researchers proposed that most swimmers cruise within a narrow range of Strouhal numbers—these are dimensionless numbers describing oscillating flow. And more recently, researchers determined that flying animals cruise in the same range of Strouhal numbers.

"Specifically, for swimming and flying animals, the Strouhal number is defined as St=f / U*A, where f is the oscillation frequency, U is the flow rate, and A is the oscillation amplitude. And the narrow range of Strouhal numbers in which swimming and flying animals cruise is 0.2 < St < 0.4.

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Tony: This to me is the most telling part, not the fantasy that follows. A narrow range maximum efficiency band that just happens to be "evolved" by the vast majority of unrelated species, including all of the many, many, many body modifications that would be required to allow this range of movement among all body types. I mean, if the albatross has the same range as a minnow, what are the chances?

Please. It's almost insulting. Even if I don't bring theology into it, their argument just defies good bloody logic. It violates the tenets of their own theory. Random mutations, variation, special divergence, not to mention that this narrow band is shared between creatures in entirely different environments. There is no evolutionary logic that can rectify that.

Only design can fit your point.