Sources

Picture 1

Slide 1

Slide 2

http://www.telegraph.co.uk/news/science/space/8045568/Particles-from-Hayabusa-space-probe-could-contain-extraterrestrial-life.html

http://www.nasa.gov/centers/jpl/education/spaceprobe-20100225.html

http://starchild.gsfc.nasa.gov/docs/StarChild/space_level2/mars.html

Picture 2

http://starchild.gsfc.nasa.gov/docs/StarChild/space_level2/viking.html