[<< wikinews] Mars Rover’s Basketball-Shaped Discovery Stirs Controversy
Thursday, January 20, 2005 
Mars — The Mars Rover Opportunity’s latest discovery has sparked a debate.  Recently, NASA’s rover found an iron and nickel object that the Cornell University researchers on the project believe to be a meteorite. 
The surface of the meteorite was found to be remarkably free of corrosion. Researchers are as yet unsure whether this means it arrived recently or that it has possibly been sandblasted thoroughly.

== Sources ==
Leonard David. "Mars Rover's Meteorite Discovery Triggers Questions" — Space.com, January 20, 2005
 "http://www.nasa.gov" — NASA, January 20, 2005