Forget about the hybrid auto -- Shai Agassi says it's electric cars or bust if we want to impact emissions. His company, Better Place, has a radical plan to take entire countries oil-free by 2020.

Forget about the hybrid auto -- Shai Agassi says it's electric cars or bust if we want to impact emissions. His company, Better Place, has a radical plan to take entire countries oil-free by 2020.

In this funny (and actually poignant) 3-minute talk, social strategist Renny Gleeson breaks down our always-on social world -- where the experience we're having right now is less interesting than what we'll tweet about it later.

In this funny (and actually poignant) 3-minute talk, social strategist Renny Gleeson breaks down our always-on social world -- where the experience we're having right now is less interesting than what we'll tweet about it later.

In this funny (and actually poignant) 3-minute talk, social strategist Renny Gleeson breaks down our always-on social world -- where the experience we're having right now is less interesting than what we'll tweet about it later.

Philosopher-comedian Emily Levine talks (hilariously) about science, math, society and the way everything connects. She's a brilliant trickster, poking holes in our fixed ideas and bringing hidden truths to light. Settle in and let her ping your brain.

Philosopher-comedian Emily Levine talks (hilariously) about science, math, society and the way everything connects. She's a brilliant trickster, poking holes in our fixed ideas and bringing hidden truths to light. Settle in and let her ping your brain.

Bonnie Bassler discovered that bacteria "talk" to each other, using a chemical language that lets them coordinate defense and mount attacks. The find has stunning implications for medicine, industry -- and our understanding of ourselves.

Bonnie Bassler discovered that bacteria "talk" to each other, using a chemical language that lets them coordinate defense and mount attacks. The find has stunning implications for medicine, industry -- and our understanding of ourselves.

Bonnie Bassler discovered that bacteria "talk" to each other, using a chemical language that lets them coordinate defense and mount attacks. The find has stunning implications for medicine, industry -- and our understanding of ourselves.

Bruce Bueno de Mesquita uses mathematical analysis to predict (very often correctly) such messy human events as war, political power shifts, Intifada ... After a crisp explanation of how he does it, he offers three predictions on the future of Iran.

Bruce Bueno de Mesquita uses mathematical analysis to predict (very often correctly) such messy human events as war, political power shifts, Intifada ... After a crisp explanation of how he does it, he offers three predictions on the future of Iran.

Bruce Bueno de Mesquita uses mathematical analysis to predict (very often correctly) such messy human events as war, political power shifts, Intifada ... After a crisp explanation of how he does it, he offers three predictions on the future of Iran.

Nathaniel Kahn shares clips from his documentary "My Architect," about his quest to understand his father, the legendary architect Louis Kahn. It's a film with meaning to anyone who seeks to understand the relationship between art and love.

Nathaniel Kahn shares clips from his documentary "My Architect," about his quest to understand his father, the legendary architect Louis Kahn. It's a film with meaning to anyone who seeks to understand the relationship between art and love.

In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

In this low-key, image-packed talk from 2002, designer Christopher C. Deam talks about his makeover of an American classic: the Airstream travel trailer.

In this low-key, image-packed talk from 2002, designer Christopher C. Deam talks about his makeover of an American classic: the Airstream travel trailer.