What drove bird evolution?

There was a scientific American article on the evolution of feathers (last year sometime I think).One idea is that they started as heat regulating devices.Once feathers are there they can act against the air to various degrees. There has been further work on that. Namely allowing an animal to run up a slope better. It seems the kinematics works out well.Those are a couple of the idea that allow a wing to get there in stages.I think, but don't know, that feather fossils show a series of developmental steps to the complex, asymetrical feathers needed for real flight.

And what does this have to do with the particular issue? If the Mars effect hasn't been dealt with correctly does that say that the issue here hasn't?It does, of course (if true), cast some doubt on all proclamations from the source but it doesn't, by itself, prove anything about this one.Examine the particular case and deal with it. Do not go off on tangents.

But the article you posted is talking about the Mars effect. If the Mars affect debunking was done poorly that does mean you have to check the information the CSICOP gives you more carefully.However, you have to do that anyway. In this case you have to review the information given on this topic. What is wrong with it?

No marks are given for the answer to this math problem. Please show your work.I would suggest that your weight figures are about the right order of magnitude but it seems to be a couple of times bigger than I might guess.

Somewhere I would think someone has done the numbers on this. Can you back this up with those numbers?