Misc: As smart as a(n) ?

Questions

native americans never actually ate turkey; killing such a timid bird was thought to indicate----------?

about ---------- years ago, most egyptians died by the time they were 30?

about 300 years ago, most ---------- died by the time they were 30?

about 300 years ago, most egyptians died by the time they were----------?

ancient ---------- slept on pillows made of stone?