Misc: what small region at end of medulla oblongata serves as 'bridge' to brain?

Questions

eagles can live in captivity for up to ---------- years?

---------- have 5 hearts?

earthworms have ---------- hearts?

every single hamster in the u.s. today comes from a single litter captured in ---------- in 1930?

every single hamster in the u.s. today comes from a single litter captured in syria in----------?