As I grew up I became more interested and was less shy about asking questions and my fear went away. That is how you learn, keep asking those questions. We do NOT know that there is life on Mars. BUT, they are not sure if their findings are true. It still could be something from earth.
Scientists have a lot more work to do before they can say there once was life on Mars.
The things that the scientists found are very, very, very small tubular objects that resemble earth-like bacteria. The scientific process is to look at the rock on a microscopic level. Mr. Dave asked me to answer your question about life on Mars. What you have been hearing in the news is the interpretation of one group of scientists. They have said that more work needs to be done before they believe it also.