Scientists skeptical about claim of alien life on Rosetta comet

Scientists are disputing the claim made by two U.K.-based astronomers earlier this week that microscopic alien life is responsible for the distinctive features of a comet. Comet 67P/Churyumov–Gerasimenko appears to have a black crust, flat-bottomed craters and mega boulders on its surface, said Dr. Mark Wallis of the University of Cardiff and Chandra Wickramasinghe, who heads…