Modern life runs on wireless technology. What if the energy powering our devices could also be transmitted without wires? Electrical engineer Ali Hajimiri explains the principles behind wireless energy transfer and shares his far-out vision for launching flexible solar panels into space in order to collect sunlight, convert it to electrical power and then beam it down to Earth. Learn how this technology could power everything -- and light up our world from space.

Drawing on his work reconstructing the vocal tract of an ancient Egyptian priest, speech scientist David M. Howard shares three evolutionary wonders of human speech -- and the importance of nurturing your own voice in an increasingly noisy world.

In all the conversations about improving education for children, the voices of students, teachers and community members are often left out. Educational designer Punya Mishra offers a method to shift that paradigm, taking us through new thinking on the root of success (and failure) at school -- and how a totally new, different kind of educational system could better meet students' needs.

In a captivating, poetic ode to the beauty and strength of mixed languages, writer Julián Delgado Lopera paints a picture of immigrant and queer communities united not by their refinement of language but by the creative inventions that spring from their mouths. They invite everyone to reconsider what "proper" English sounds like – and imagine a blended future where those on the margins are able to speak freely.

In a practical, playful talk, leadership visionary Anne Morriss reinvents the playbook for how to lead through change -- with a radical, one-week plan to build trust and fix problems by following a step per day.