Life on mars

With all the similarities between earth and mars, many people thuoght that there could be life on mars. In 1877, schiaparelli, an italian astronomer, thought that he saw straight lines on the planet. Another american astronomer, percival lowell, thought that these lines were canals and concluded that they muast have been bilt by the people of mars. He said that the people of mars planted crops along the canals. Then a few years ago, some space craft, without people on board, visited mars. They had special automatie spades at tached to them. The spades dug up some soil in mars and brouht it back to earth. Test were carried out but they revealed no evidence of any life form on mars. Photographs proved there were no canals