How to succeed? Get more sleep | Arianna Huffington

Why we have too few women leaders | Sheryl Sandberg

When ideas have sex | Matt Ridley

What adults can learn from kids | Adora Svitak

William Kamkwamba: How I harnessed the wind

Arthur Benjamin: Teach statistics before calculus!

Michelle Obama's plea for education

Laura Trice: The power of saying thank you

Murray Gell-Mann: Do all languages have a common ancestor?

The habits of happiness | Matthieu Ricard

Lightning calculation and other "mathemagic" | Arthur Benjamin

Jill Sobule: A happy song about global warming

Do schools kill creativity? | Sir Ken Robinson | TED