On May 8, 2007, at 3:52 PM, Kyle Schmitt wrote:

> I've read somewhere, and would love for it to be wrong, that ruby
> doesn't use real threads, that it handles it's threads internally.  Is
> that true?  If it is true, will that still be true when ruby 1.9, or
> 2.0 comes out?

This was recently discussed in detail by the creators:

http://blog.grayproductions.net/articles/2007/04/27/the-ruby-vm- 
episode-iii

James Edward Gray II