knowledge of the Mars environment, it is not possible to conclude whether it fell recently or not. Other nickel-iron meteorites found on Mars Following the identification of Heat Shield Rock as a meteorite, five similar iron meteorites were discovered by Opportunity (informally named "Block Island", "Ireland" "Mackinac Island", "Oileán Ruaidh" and "Shelter island"). Two nickel-iron meteorites were identified by the Spirit rover (informally named "Allan Hills" and "Zhong Shan"). One nickel-iron meteorite has been identified by the Curiosity rover, tagged "Lebanon." In addition, several candidate stony meteorites have also been identified on Mars. Terminology The term "Martian meteorite" usually refers to something entirely different: meteorites on Earth which are believed to have originated from Mars, a famous example being ALH84001. Gallery See also References Further reading D. S. Rodionov, et al., "An Iron-Nickel Meteorite on Meridiani Planum: Observations by MER Opportunity’s Mössbauer Spectrometer," European Geosciences Union; Geophysical Research Abstracts, Vol. 7, 10242; 1607-7962/gra/EGU05-A-10242 (2005). Christian Schröder, et al., "Meteorites on Mars observed with the Mars Exploration Rovers," Journal of Geophysical Research: Planets, v. 113(E6), E06S22, (2008). A. S. Yen, et al., "Nickel on Mars: Constraints on Meteoritic Material at the Surface," Journal of Geophysical Research: Planets, v. 111, E12S11, (2006). G. A. Landis, "Meteoric Steel as a Construction Resource on Mars,", Acta Astronautica, Vol. 64, No. 2–3 (Jan–Feb. 2009). Presented at the Ninth Space Resources Roundtable, Colorado School of Mines, October 2007 presentation, 5.9 mb (powerpoint) External links Nasa's Mars Exploration Program NASA announcement NAA Opportunity Archive: sol-by-sol account of the program and the discovery of Heat Shield Rock JPL meteorite image JPL Photojournal entry on meteorite Sky & Telescope article Space.com article Article in Meteoritical Bulletin Official Mars Rovers site Meteorites Found on Mars Planetary Science Research Discoveries article. Rocks on Mars Iron meteorites Meteorites found on Mars Mars Exploration Rover mission 2005 in science