Boiling Frog
Truth Activist
This certainly appears to be a some type of rodent in my opinion!

Source:
http://www.livescience.com/37289-bes...-the-week.html

NASA's Mars rover Curiosity will apparently perform no follow-up studies of a Red Planet rock that resembles a rodent, dealing a blow to the nascent field of Martian mammalogy.*
The so-called "Mars rat" has generated a lot of Internet interest lately, with some UFO buffs claiming that it may be an indigenous Red Planet life form or an Earth rodent Curiosity carried to Mars as part of a secret experiment.
Source:
http://www.livescience.com/37289-bes...-the-week.html