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 2 Episode 1 | 13m 2s | CC
Join Joe in this exploration of a true titan of modern engineering: the world's largest crane. With a lifting capacity of 5,000 tons, this giant ring crane at Rotterdam's Mammoet headquarters is a true powerhouse that plays a crucial role in the renewable energy revolution, building massive offshore wind turbines that help combat climate change. And yes, they may let Joe drive it.