Imagine what we could learn about diseases by studying the history of human disease, from ancient hominids to the present. But how? TED Fellow Christina Warinner is an achaeological geneticist, and she's found a spectacular new tool -- the microbial DNA in fossilized dental plaque.

At face value the lines between verbal irony sarcasm and compliments can be blurry. After all the phrase 'That looks nice' could be all three depending on the circumstances. In the final of a three part series on irony Christopher Warner gets into the irony you may use most often and most casually: verbal irony. [Directed by Ben Pearce, narrated...

You're in a movie theater, watching the new horror flick. The audience knows something that the main character does not. The audience sees the character's actions are not in his best interest. What's that feeling -- the one that makes you want to shout at the screen? Christopher Warner identifies this storytelling device as dramatic irony. [Dire...

Leaps and bounds separate that which is ironic and that which many people simply say is ironic. Christopher Warner wants to set the record straight: Something is ironic if and only if it is the exact opposite of what you would expect. [Directed by Ben Pearce, narrated by Christopher Warner].