| USA TODAY Space rocks big enough to destroy a city hit the Earth much more often than thought, according to an estimate by a private group devoted to preventing disaster from such orbital killers. It took a space rock the size of San Francisco to finish off the dinosaurs 65 … Video: Earth has had 26 powerful asteroid explosions in 13 yearsLos Angeles Times Risk of asteroid hitting Earth higher than thought, study showsReuters Earth Hit By 26 Nuclear-Level Asteroid Impacts Since 2000 – How Frequent Are …International Business Times BBC News –MyNorthwest.com –io9 all 98 news articles |
Source: Tech News From Google