It glides! Birdlike Dinosaur Was Adept Glider How did birds learn to fly? The first flight tests of a foam model of a four-winged, feathered dinosaur suggest that early birds may have started their aviation careers by gliding down from trees. [...] In recent years, researchers have tried to determine the flight capabilities of early [...]

The irreducible complexity argument was developed by Michael Behe and first used in his book Darwin's Black Box. The argument is that some biological systems are so complex that they can not have evolved though mutation and natural selection; it you remove one peace, it brakes, it no longer functions. Creationists often use the analogy [...]