I agree. There used to be this theory of "Near Earth sized in a similar orbit" but it's much more complicated. One other example to support your point - Appar

I agree. There used to be this theory of "Near Earth sized in a similar orbit" but it's much more complicated. One other example to support your point - Apparently life is protected on Earth by having a Jupiter around to suck up many of the asteroids. http://www.space.com/17793-jupiter-giant-windy-gas-ball-protecting-the-inner-solar-system-video.html http://www.space.com/17793-jupiter-giant-windy-gas-ball-prot... This prevents extinction events from being much more common. Who knows how else we're unique?