Surprise! the Mars Exploration Rover, appropriately named Opportunity, while on its appointed journey came accross an oddly shaped, dark rock, which may be a meteorite and is about 2 feet across, found on the surface of the Red Planet on July 18, 2009.

The team spotted the rock called 'Block Island' in the opposite direction from which it was driving. The rover then backtracked some 820 feet to study it closer. Scientists will test the rock with the alpha particle X-ray spectrometer to get composition measurements and to confirm if indeed it is a meteorite.

Image Credit: NASA/JPL-Caltech