IBM researchers have found a way to store one bit of data in a magnet consisting of just one atom, the company announced on Wednesday. Prior to the discovery, the smallest bistable magnetic bits consisted of 3 to 12 atoms, IBM said, and hard drives use about 10,000 atoms to store a single bit. The ability to read and write one bit of data on one atom creates new possibilities for developing smaller and denser storage devices, according to IBM. The company said the discovery makes it conceivable to store an entire library of 35 million songs on a device...