('''Source:''' NASA
'''URL:''' [http://www.gutenberg.org/dirs/1/2/0/8/12082/12082-h/opportunity/op.htm http://www.gutenberg.org/dirs/1/2/0/8/12082/12082-h/opportunity/op.htm]
'''Description:''' Rock Abrasion Tool (RAT) on the Mars Rover Opportunity's Ins)