Bite into a juicy heirloom tomato from a local farmers market and you could be chewing on a bit of history and cross cultural exchange. That’s because someone may have collected, saved and shared the tomato seeds. Master gardener John Coykendall is one of them. He speaks with with Colorado Matters ahead of a "Slow Food Denver" Earth Day event this Sunday at Infinite Monkey Theroem. A documentary about his work will also be screened. For the last 60 years he’s collected seeds and their stories from around Appalachia and the South.