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  1. 19001

    I am deeply disturbed by the research involving manipulation of a rat’s brain to remotely control its behavior. Why does this article mention the researchers’ qualms about possible danger to the animal in entering risky situations but not the danger to the integrity of what we consider its conscious life? Ruth HousmanNewton Center, Mass.

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  2. Rescue Rat: Could wired rodents save the day?

    Researchers have wired a rat's brain so that someone at a laptop computer can steer the animal through mazes and over rubble.

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  3. Paleontology

    Ancient Whodunit: Scientists indict wee suspects in ancient deaths

    Evidence locked in 180,000-year-old sediments suggests that a toxic algae bloom was the cause of death for a large group of mammals that were fossilized intact on an ancient lake bottom.