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Amazon鈥檚 new tablet is the Kindle Fire. It runs Android and it鈥檚 smaller and it鈥檚 less than half the price of the iPad. Click discusses how much of a challenge it is to Apple.

An orthopaedic surgeon has gone to unusual lengths in his approach to learn and understand anatomy and help him prepare for operations. He has 3D printed a model of one of his patient鈥檚 bones. Click talks to the surgeon Mark Frame about his innovative and cheap use of technology.

People the world over need reminding about the carbon they use when we travel the globe. But more locally, how much could we cut down our emissions by taking the bus or walking? That鈥檚 the question posed by the developers of an app called CO2GO. Christian Sommer, a Postdoctoral Fellow at MIT talks to Jon Stewart about monitoring your own emissions.

Researchers are waking up to the potential of social networking for aiding an understanding of social science. A recent study has shown the benefits of Twitter in this regard. Each Twitter update might only be 140 characters but with 230 million tweets every day, that adds up to a dream data set if you鈥檙e a social scientist interested in what people all over the world are saying to each other. Scott Golder from Cornell University joins Click to discuss how and why the researchers used Twitter to get a better understanding of our mood swings in the course of a day.