The iTunes U app gives you access to complete courses from leading universities and other schools - plus the world’s largest digital catalog of free education content - right on your iPad, iPhone, or iPod touch.
Video tutorial e previews of the app:
[video:http://vimeo.com/33626913]
Digital Discoveries on Vimeo
Do you remember A Sound of Thunder, a short story by Ray Bradbury published in 1952? During a time travel's safari, the unintentional killing of a butterfly causes several changes at present-days. In chaos theory, the butterfly effect is a phenomenon whereby a minor change in circumstances can cause a large change in outcome. Today, after many years, we could probably speak about the Twitterfly effect.
