As Cary Fowler and Geoffrey Hawtin began thinking about ways to prevent starvation and protect the world’s food supply, they came up with what Fowler called “the craziest idea anybody ever had” — a global seed vault built into the side of an Arctic mountain.

About 20 years ago, Fowler, now the U.S. special envoy for Global Food Security, and Hawtin, an agricultural scientist from the United Kingdom, envisioned the so-called “doomsday vault” as a backup spot for seeds that could be used to breed new crops if existing seed banks were threatened by wars, climate change or other upheaval. On Thursday, officials in Washington announced that Fowler and Hawtin would be named 2024 World Food Prize laureates for their work.

The Svalbard Global Seed Vault on the Norwegian island of Svalbard opened in 2008 and now holds 1.25 million seed samples from nearly every country. The largely concrete structure, built into the side of a mountain, provides genetic protection for over 6,000 varieties of crops and culturally important plants.