- Architect Kate Orff sees the oyster as an agent of urban change. Bundled into beds and sunk into city rivers, oysters slurp up pollution and make legendarily dirty waters clean—thus driving even more innovation in "oyster-tecture." Orff shares her vision for an urban landscape that links nature and humanity for mutual benefit.
- Sophal Ear, Assistant Professor in the Department of National Security Affairs at the US Naval Postgraduate School, shares the compelling story of his family's escape from Cambodia under the rule of the Khmer Rouge. He recounts his mother's cunning and determination to save her children.
- Facebook COO Sheryl Sandberg looks at why a smaller percentage of women than men reach the top of their professions—and offers 3 powerful pieces of advice to women aiming for the C-suite.
- In 1992, at the age of 12, Severn Suzuki and some friends from Vancouver, British Columbia raised money to attend the Earth Summit in Rio de Janeiro. Suzuki gave a six-minute speech to delegates gathered from around the world. She pleaded eloquently for adults to stop the destruction of planet Earth.
- 2. Jacob Kraybill, a Mennonite and student at Goshen College—a Christian college in Indiana—argues strongly for gay marriage as part of the 2008 Henry Smith Peace Oratorical Contest.
Additional speeches on a range of topics can be found at www.ted.com/talks.