Re: what if Earth were tilted 90 degrees instead of 23 ?

[EMAIL PROTECTED] (vr) wrote...
> would people have to migrate like birds to survive? what would be
> the best place to live then?

This is called a "tidally locked world" and you can find more about it at:
  http://www.google.com/search?q=tidally+locked+worlds

A study was done on this, and the modelling suggests that the atmosphere
is not as extreme as might be thought.  The citation is:

Joshi, Haberle, & Reynolds, "Simulations of the Atmospheres of
Synchronously Rotating Terrestrial Planets Orbiting M Dwarfs: Conditions
for Atmospheric Collapse and the Implications for Habitability", Icarus
V129, pp450-465, 1997

Not sure where you would find this online though.

Mark