Are we alone?

I believe that there are other lifeforms other than those on earth. The bubble space telescope has found many planets that are or have been able to support life; however, it is unknown whether there is life on those planets. For example, Mars, one of our closest planets has evidence of liquid water. Waterlike erosion and river marks have been found. There is proven to be water on Mars(in ice form), but it is toxic to us to drink. With 10,000,000,000,000,000,000,000,000 planets being out there, chances are that some of them support life.