does life as we know it on earth exist on any other planet in our solar system?

I fervently hope that it does. Statistically, it seems impossible that it couldn't. How near us, their level of development, and any similarity to humanoids is another issue. I hope the question is answered in my lifetime.

Yep, the Drake equation is our best guess right now about the likelihood of the existance alien lifeforms. Given the mindboggingly huge size of the universe, it's very likely that such life exists; but conversely, also due to this unsurmountable size (and therefore distance separating the galaxies and stars), it is incredibly unlikely that in our lifetime any such lifeform would make contact with such a small planet in an unremarkable galaxy lost somewhere in this vast universe.

Our own galaxy is about 70000 - 100000 thousand light years across. The universe contains billions of galaxies, it is highly unlikely that Earth is the only planet that has life. now see this thing i found . The Drake Equation: N = N* x fp x ne x fl x fi x fc x fL N, the number of communicating civilizations in the galaxy. N* represents the number of stars in the Milky Way Galaxy fp is the fraction of stars that have planets around them ne is the number of planets per star that are capable of sustaining life fl is the fraction of planets in ne where life evolves fi is the fraction of fl where intelligent life evolves fc is the fraction of fi that communicate fL is fraction of the planet's life during which the communicating civilizations live Try the calculator and see for yourself!