When Fred Whipple in 1950 identified the drag of water vapour as a potent force to accelerate grains off the surface of a comet, his mathematical description of dust ejection by water vapour drag first described the formation of a meteoroid stream. A problem with this scenario is the large fraction of meteoroid streams that have no known parent body. Many of these streams, such as those responsible for the Quadrantids, the Geminids, the alpha-Capricornids and the Sextantid meteor shower, are so little dispersed that they can not be older than 2,000 years. In the past three years, all of these streams were found to have associated minor planets. 2003 EH[1 ]moves in the highly inclined Quadrantid stream, 2002 EX12 moves among the alpha-Capricornids (and was weakly active when at perihelion), and 2005 UD moves among the small-q Daytime Sextantids. These streams appear to originate in discrete formation events, presumably a form of fragmentation. In some cases, the single-year sighting of a comet may mark that event. In each case, the amount of mass in the stream is less or equal to the largest remaining fragment discovered so far. Instead of a catastrophic fragmentation, these streams appear to be the result of the spill-off of a comet fragment, which subsequently broke into meteoroids. The scars of this spill-off have now been identified on active short-period comet 9P/Tempel 1.