Page 33 - The Origin of Birds and Flight

Harun Yahya (Adnan Oktar) 31

Furthermore, theories provide no explanation of the origin of feath-
ers, or how the complex structure of birds’ brain or their essential three-
dimensional perceptual-control mechanism came into being.

The Historical Development—and Invalidity—of the Cursorial
Theory
The cursorial theory was first advanced by Samuel Williston in 1879.
Without offering any details of how it might have happened, Williston
suggested that flight could evolve through a number of stages: running,
jumping, leaping from on high, and gliding. In 1907 and 1923, Franz
Baron Nopcsa added some detail to Williston's claim and suggested that
an animal could develop wings for speed as it ran along the ground.
However, there is no such case of living things using wings for greater
speed, and flexed wings actually increase air resistance. 10 Furthermore,
this theory does not seek to explain how wings first
developed from forelegs.