i stumbled upon this news item on the bbc news site - Doomsday vault begins deep freeze.
engineers are building the svalbard international seed vault in a mountain on one of the islands of svalbard, norway, where they will store seeds from all known varieties of key food crops by freezing them at -18C. built to hold about 4.5 million seed samples the vault aims to safeguard the world's crops from future disasters such as nuclear wars, asteroids or dangerous climate change.

the concept is amazing and i could think of somre more such vaults for :
- books
- art
- films
- recipes
- animals/ birds/ insects
... a post-modern noah's ark of sorts!

but a few questions come to mind -
1. what if nobody survives doomsday to pull out the seeds from the vault?
2. will there be any arable land left for use?