Dont worry about that. check this out!!!!!!!!!!!!!!!!!!!!
http://wanderingspace.net/wp-content...5/mars_pit.png
going to google for more info to see if its real
http://www.planetary.org/blog/article/00000984/
http://apod.nasa.gov/apod/ap070528.html
its real alright!!! Very strange thats its in total darkens Lets get down there and have a look NASA
