Re: Origin of feathers

[Dinogeorge <Dinogeorge@aol.com>]

In a message dated 98-04-15 06:34:25 EDT, jwoolf@erinet.com writes:

<< Or decreased mass will work too.  While gravitational acceleration doesn't
vary
 with mass, energy of impact does.  All other factors being equal, a 1kg
animal
 takes less damage from a fall than a 10kg animal will. >>

Exactly so. Mass decrease in dino-birds was accomplished by (1) small size of
individuals, and (2) lightening of the skeleton through hollowing of the
bones.