Jill Bolte Taylor got a research opportunity few brain scientists would wish for: She had a massive stroke, and watched as her brain functions -- motion, speech, self-awareness -- shut down one by one. An astonishing story.

Do you feel like you show up as different versions of yourself depending on the situation? Neuroanatomist Jill Bolte Taylor introduces the four characters in every brain: your structured and organized self, your emotional self, your creative genius and your consciousness. Tapping into the potential of the whole brain, Bolte Taylor shares how to ...

Do you have a TED Talk inside, just bursting to come out? Take this tongue-in-cheek musical journey to "Give Your Talk." A musical love letter to our speakers -- written, directed and performed by the TED staff.

Daniel Kraft demos his Marrow Miner -- a new device that quickly harvests life-saving bone marrow with minimal pain to the donor. He emphasizes that the adult stem cells found in bone marrow can be used to treat many terminal conditions, from Parkinson's to heart disease.

In this brand-new slideshow (premiering on TED.com), Al Gore presents evidence that the pace of climate change may be even worse than scientists recently predicted. He challenges us to act.