Update: It appears the story below is bogus. (Hat tip Pzatchok.) It appears to be a combination of two different stories, one in which gardeners from the Miami Nation in Indiana donated old seeds to a research group, and the second where that same research group attempted to grow seeds found in a Kentucky cave, with poor results.
Students who discovered some ancient seeds in a clay pot at an archaeological site in Canada successfully planted them to grow a previously extinct species of squash.
Not all the seeds grew, but enough did. Moreover, the new squash produced new seeds. This once extinct squash is no longer extinct. And according to the article is also tastes delicious!