image: (Left) The Ash-Seth boundary shows evidence of collapse with talus at the base (positions A and B). Fracturing to produce crevices (C) is also observed, with deflation of the surface (D and E) appearing as a possible precursor (NAC_2014-08-07T18.37.34.552Z_ID30_1397549700_F22). (Right) Oblique view of a circular depression in Seth, which appears to have been partially eroded. The face (F) appears rather uniform in texture, with some evidence of linear features. Note also the evidence of surface deflation (G) and that the horizontal slope appears dust-covered, whereas the vertical face appears "clean" (NAC_2014-09-02T21.44.22.575Z_ID10_1397549800_F22). This material relates to a paper that appeared in the Jan. 23, 2015, issue of Science, published by AAAS. The paper, by N. Thomas at University of Bern in Bern, Switzerland, and colleagues was titled, "The morphological diversity of comet 67P/Churyumov-Gerasimenko." view more
Credit: [Credit: N. Thomas <i>et al.</i>, SCIENCE, VOL347, ISSUE 6220 (2015)]