Pierre Auger Observatory in 2007's top science stories

The Pierre Auger Collaboration's correlation between active galactic nuclei and the highest-energy cosmic rays that hit earth was among the media's favorite scientific breakthroughs in 2007. The result made the cover of Science on Nov. 9.

Results from the Pierre Auger Observatory made a lasting impression on the scientific community in 2007. The announcement by the Pierre Auger Collaboration that active galactic nuclei were the most likely source for the highest-energy cosmic rays that hit the earth made the list of breakthroughs and top science stories for several science media organizations.

The journal Science listed the correlation third among all scientific breakthroughs of the year.

The editors at Nature magazine picked it as one of their favorite stories of the year not published in Nature.

The American Institute of Physics named it as one of the top 10 physics news stories of the year.