Mars 1st image (Viking1 Year 1976) was quite revealing

 Dear Earthlings

The 1st image by Viking1 on 20th July 1976 actually revealed it all but it was difficult to Humans to digest in 1976.

Even the 1st image showed the signs of life on mars but we were too interested on image rather than its content.

in this image you can see the creatures captured by viking1 .There are much more than that but i am circling on few - Have a Look .

Have a nice day/night.