Intermediate Word:  allusion -  (a) mistaken idea  (b) close similarity  (c) a story that symbolizes a point one is trying to make  (d) two-wheeled shay
Difficult Word: - hackamore   (a) Scottish broadsword  (b) shade tree  (c) band blinding horses during break-in  (d) Eskimo who developed first written language

Key to stem cell immortality found - MSNBC Left:  The top part of this photomicrograph shows egg chambers produced regularly by a fruit fly's normal germline stem cells. The bottom part shows a big developmental gap for a stem cell that has been genetically modified to disrupt microRNAs. The blue circles are nurse cells that nourish each red egg cell.  One of the medical marvels of stem cells is that they continue to divide and renew themselves when other cells would quit. But what is it that gives stem cells this kind of immortality? Researchers report in the journal Nature that microRNAs appear to shut off the "stop signals" or brakes that would normally tell cells to stop dividing. And now that the researchers have found that too few microRNAs are bad for stem cells, they want to see what an abundance of microRNAs will do.
A bus emits black smoke from its exhaust Bush aide 'edited climate papers'  - BBC  Philip Cooney removed or adjusted descriptions of climate research that had already been approved by government scientists, the newspaper said. Before working at the White House, Mr Cooney was a lobbyist at the American Petroleum Institute, the largest oil industry trade group. He is a lawyer by training, with no scientific background. The New York Times said he made dozens of changes to reports issued in 2002 and 2003, and many appeared in final versions of major administration climate reports.   


The future of robots - MSNBC  Robots of all shapes and sizes were batting fastballs, drawing portraits, teaching the waltz and doing standup comedy at the World Expo but several years of testing are still needed before most of them can be used in public, developers say. Lined up in a row of booths, the more than 60 robots on display starting Thursday at the Prototype Robot Exhibition being held in a corner of the sprawling expo in Aichi, in central Japan are designed to become part of everyday lives, helping the sick, rescuing disaster victims and entertaining families. The exhibit, which runs through June 19, aims to showcase Japan's leadership in robotics. With the nation's economy still sluggish, corporations, researchers and government officials are hoping the sector can provide new growth opportunities. The Japan Robot Association, a trade group, expects the Japanese market for next-generation robots those being developed now as opposed to industrial robots currently in use to grow to $14 billion by 2010, and to more than $37 billion by 2025.       

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