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Device helps monkeys move paralyzed wrists CHICAGO (Reuters) - Monkeys regained the use of paralyzed wrist muscles with a computer-aided device that uses brain signals to direct movement, U.S. researchers said on Wednesday. "Walking fish" reveals fresh evolutionary insights WASHINGTON (Reuters) - An extraordinary fish that existed 375 million years ago had unique features in its head that helped pave the way for vertebrate animals to live on land, scientists said on Wednesday. Study finds brain chemical linked to grief LONDON (Reuters) - Scientists have pinpointed a key brain chemical involved in dealing with the sudden loss or long-term separation of a partner, they said Wednesday. Ancient bones show tuberculosis older than thought LONDON (Reuters) - Scientists have discovered tuberculosis in 9,000 year-old human bones found submerged off Israel's coast -- evidence the disease is at least 3,000 years older than previously thought, researchers said on Wednesday. NASA to attempt to reboot Hubble Space Telescope CAPE CANAVERAL, Florida (Reuters) - NASA will attempt on Wednesday to revive the $2 billion Hubble Space Telescope, which was idled two weeks ago by an equipment failure, officials said on Tuesday. NY museum's climate change show dives into politics NEW YORK (Reuters) - One of America's most renowned science museums dives into politics again this week with a new exhibition on climate change that curators say is an effort to separate fact from fear. Workout for brain just a few clicks away CHICAGO (Reuters) - Searching the Internet may help middle-aged and older adults keep their memories sharp, U.S. researchers said on Tuesday. Sons of Russian, U.S. astronauts unite in orbit MOSCOW (Reuters) - The sons of a Russian cosmonaut and a U.S. astronaut met in space on Tuesday when spaceman Sergei Volkov welcomed American Richard Garriott on board the International Space Station. Hippie apes make war as well as love, study finds LONDON (Reuters) - Despite their reputation as lovers not fighters of the primate world, bonobos actually hunt and eat other great apes, German researchers said Monday. AIDS vaccine focus shifts after disappointments WASHINGTON (Reuters) - A global AIDS vaccine conference this week will seek fresh strategies against the HIV virus, with experts weighing the value of basic laboratory research against large-scale human clinical trials after a string of disappointments.