Correction
NOV 01, 2014
DOI: 10.1063/PT.3.2568
October 2014, page 12 —The first sentence in the second paragraph under the subhead “Cosmic foil” should read, “The team’s search turned up 20 impact craters, including the one shown in figure 2.” The majority of craters were identified manually.
© 2014. American Institute of Physics
