Rocky Mountain PBS
Colorado Science: Researchers discover secret to Castle Rock's longevity
Denver Museum of Nature and Science researchers found that Castle Rock’s durability is due microscopic amounts of the colorful gemstone opal.
Season 1 Episode 3 | 54m 40s | CC
Join the baby animals as they near the end of their first year of life. It’s time for these young ones to branch off from the comfort of their mothers and learn to explore the great unknown on their own.