This patch of beating heart cells is been positioned over an array of nanowire transistors, one of which is visible at center. The nanowires can make high-resolution recordings of electrical signals in biological cells.
A video demonstrating how Tor uses a series of relays to protect anonymity online.
MIT physicist Gabriella Sciolla explains what dark matter is, what physicists believe it might be like, and what technologies are behind the search for dark matter.
Roger Dingledine, leader of the Tor Project, describes where the anonymity technology came from, who uses it today, and how it will improve--and its usage will expand--in the future.