Edward Tenner: Unintended consequences. William Kamkwamba: How I harnessed the wind. TED - Can pills change our morals? TED: Ideas worth spreading. Nick Bostrom on our biggest problems. Susan Blackmore on memes and "temes" Joan Halifax: Compassion and the true meaning of empathy. "Imagine" by Emmanuel Kelly on The X Factor 2011. Thandie Newton: Embracing otherness, embracing myself.