The birth of a Mars rover isn't so different from the birth of a baby: It's a long, painful process, everybody wears masks and gowns, and someone always wants to get it on tape. Yesterday, the proud engineers at the Jet Propulsion Laboratory in Pasadena, California started streaming live video of the birth of their own bundle of joy, the next-generation Mars rover Curiosity, which is now under construction in a JPL cleanroom. Check it out here, or join the conversation on Ustream, where you'll also find a calendar of scheduled activity. (Word is that Curiosity's six wheels will be going on today.)