SpaceX to launch rocket today? After 3 attempts in the last week, it's trying again and other top stories.

• SpaceX to launch rocket today? After 3 attempts in the last week, it's trying again

  A SpaceX Falcon 9 rocket waits on the launch pad Sunday at Cape Canaveral Air Force Station in Florida. (Craig Bailey / Florida Today) Elon Musk’s SpaceX will try again to launch a commercial communications satellite into orbit Tuesday afternoon -- the fourth attempt in the last week. The launch of the Hawthorne-based company's Falcon 9 rocket is scheduled for 3:35 p.m. PST at Cape Canaveral Air Force Station in Florida. The satellite, SES-9, would provide services such as broadcasting and v..

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• Scientists reveal one weird trick for finding aliens

  

  Maybe a team effort is the best way to search for aliens. That is, teaming up with the extraterrestrials themselves.A new study suggests that perhaps we should be looking for aliens who are looking for us in the hope of finding each other and communicating.The idea is to flip our current apprach around. NASA's Kepler spacecraft has discovered more than 1,000 exoplanets by watching for the light of a star to dim as an orbiting planet passes by. Scientists now suggest that we target worlds that c..

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• Monarch butterflies on the rebound

  

  Monarch butterflies are on the rebound after years of population decline, according to a new report.  The latest population counts show a 255 percent increase over last year in the wintering habitat area Monarchs occupy, officials said Friday. Wintering butterflies covered about 10 acres of habitat in Mexico this year, compared to about 2.8 acres the year prior, according to a news release from the U.S. Fish and Wildlife Service.  The butterflies embark on a two month long migratory path from ..

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• Oldest Nervous System Found in 520-Million-Year-Old Fossil

  

  Fossils of an ancient creature resembling a shrimp with an armored head contain the oldest and best-preserved nervous system ever found, which could help scientists decipher the evolution of nervous systems in animals alive today, according to a new study. The remarkable remains belonged to Chengjiangocaris kunmingensis, a crustaceanlike creature that lived 520 million years ago in what is now South China. The fossils revealed a long "ropelike" central nerve cord that extended throughout the bod..

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• In emergencies, people place too much trust in robots

  

  Imagine that you're in an unfamiliar building, participating in a research experiment. A robot escorts you from room to room to complete a survey about robots and then read an unrelated magazine article. The robot that you are following around is a bit unreliable, though. It guides you to the wrong room a few times and has broken down before. (The robot is secretly being controlled by one of the experimenters.)Suddenly, the fire alarms go off and smoke fills the hallway. The robot, with the wor..

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