text: In conclusion there are people that say that the face on Mars was built by aliens and that it is a face if an egiptian pharoh, but scientists have answered this question and they say that it is just a natural land form like a mesa. So what do you think? Do you think that the face on Mars was made by aliens? belive what you think but acirding to evedance it was not made by aliens . What do think?What makes this a valueable tool to students? Can this tool be used on cell phones? Can we make this tool worldwide for all schools? what will the outcome of students emotional expressions if this tool is valuable?