 Behold, the mighty ant. Minuscule, but quite amazing. The ants go marching one by one, hurrah, hurrah. You always knew the ants could march, but did you know they can also perform surgery on themselves? Research in the journal Current Biology says when one ant has a leg injury, other ants will either clean the wound, or if they can't clean it well enough, amputate the ant leg altogether. The only other species that does that is humans. Sherry Preston, ABC News.