Modern Marvels: The story of rubber is more than tires, toys, gloves, and gum--it's imbedded in modern life, from the controversial Challenger O-rings to seals on hydrogen fuel cells. A gigantic worldwide synthetic rubber industry creates exotic elastomers for high-tech applications, while China's rapid industrialization plays havoc with the world's natural rubber supply. From the ancient Olmecs of Yucatán, who knew the secret of vulcanization, to modern processing plants, we trace rubber's history and future.