Intermediate Word:  pedicular - referring to  (a) the base of a column  (b) pedals  (c) lice  (d) poetic meter
Difficult Word:
  chryselephantine -  (a) sinuous  (b) made of gold and ivory  (c) thick-legged  (d) ponderous

Will Home Robots Ever Clean Up?  - Technology Review -  Roomba -- a self-navigating vacuum cleaner with wheels for feet, infrared sensors for eyes, and a flair for picking up dog hair -- is the most successful consumer-market robot in history. Its maker, iRobot of Burlington, MA, has sold more than 1.5 million* of the Frisbee-shaped gadgets since their debut in September 2002. In truth, the idea of robots in every home seems further away today than it did four years ago. The reasons are not entirely clear. However, "bringing all the parts together in one place is a nontrivial matter."     
Two Other Mars Missions Heating Up - SpaceDaily   Left:  Illustration of MRO in orbit about Mars  Two Mars orbiter missions - one from NASA, the other from the European Space Agency (ESA) - will open new vistas in the exploration of Mars through the use of sophisticated ground-penetrating radars, providing international researchers with the first direct clues about the Red Planet's subsurface structure. The combination of the radars on the two missions will provide important and unique data sets that will directly map the structure of the upper portions of the interior of Mars. The Mars Reconnaissance Orbiter (above) is poised to go into orbit around Mars in March. 

Mile-Wide Asteroid Passes Close On Monday - SpaceDaily  An asteroid named 2000 PN9 will fly past Earth at a distance of about 2 million miles on March 6. There is no danger of a collision with the mile-wide space rock, but its nearest approach distance of eight lunar distances - on average, the Moon is 384,401 kilometers, or 246,017 miles away. Potentially Hazardous Asteroids are space rocks larger than about 100 meters (300 feet) wide that can approach Earth at distances closer than 0.05 astronomical units (the distance from Earth to the Sun), or about 4.6 million miles. At present, none of the 776 known PHAs is on a collision course with the planet for the foreseeable future.    

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