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good idea! wheelchair ramp incorporated into stairs.

SVALBARD GLOBAL SEED VAULT, the Seed Vault is a giant store house with over 10,000 seeds and plant material. The reason for this bio-bank is to “provide a safety net against accidental loss o diversity in traditional genebanks”. Basically it’s a giant vault of plant life, so that plants that could be important to us in the future don’t die out or go extinct.

Well, I guess they have an assortment of round, triangular, and square/rectangular logs cut so they have the perfect log in any situation.