At 11:32 1997-11-17 -0800, you wrote:
>All responses interesting..thnx. However>>>>
>
>   Regret did not make question clearer. I didn't mean how would early
>humans open nuts.. I meant: how does such an impenetrable seed open in
>nature..*in the absence of humans/animals*..in order to seed the next
>generation of macadamia plants.??

Well, I think some time at the moist ground makes it. The shell
gets rotten.

- Hans