How do we search for alien life if it’s nothing like the life that we know? Christoph Adami shows how he uses his research into artificial life — self-replicating computer programs — to find a signature, a “biomarker,” that is free of our preconceptions of what life is.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the “Sixth Sense” wearable tech, and “Lost” producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at http://www.ted.com/translate.

Elly’s channel: http://www.youtube.com/AppChat

In this video Elly from AppChat and I discuss the new Apple iPhone 4S vs iPhone 4 as well what all is new with the iPhone 4S on Sprint, Verizon and AT&T. We also discuss some of the other products announced at the event including the new white iPod touch 5G, Siri on the iPhone 4 and iPod touch 4G.