Wolfram Alpha is launching soon. Developed by Wolfram Research, Alpha is a knowledge engine with a natural language front end: it's designed to answer questions about domains of structured knowledge, much as search engines come up with answers about unstructured piles of data.
The 3D bone printer deposits tricalcium phosphate and polylactic acid in layers to build up a bone-like matrix, then bone marrow stem cells are used to grow osteoblasts which are washed into the scaffold. On then being cultured under the skin of a living animal (in trials they use mice) it matures into living human bone tissue. If they can get blood vessels to grow into the material, and layer muscle and other tissue over it, there may be hope for amputeees.
(I'm trying to figure out a way to combine these news stories. How about you?)