I've heard from someone that raises parrots that they can get as smart as
a five-year-old. I imagine that this is along only one or two of the many
axes of intelligence, though.
I assume that by "brain cells" you mean neurons? I think humans can
regrow non-neuronal brain cells (in adulthood).
Kennita
Kennita Watson | The bond that links your true family is not one of blood,
kwatson@netcom.com| but of respect and joy in each other's life. Rarely do
| members of the same family grow up under the same roof.
| -- Richard Bach, _Illusions_