Video. Nobel Laureate John Mather and Nat Geo Explorer-in-Residence Robert Ballard discuss how technology expands the limits of the known universe at an NG Live event in Washington, DC. In this excerpt, Ballard details the discovery of hydrothermal vents at the bottom of the ocean.
- Best for: Grades 6+ (ages 11+)
- Concepts: discovery, explorers, hydrothermal vents, ng live, ocean, robert ballard