TUCSON, Ariz. - NASA's Phoenix Mars Lander has taken the first-ever
image of a single particle of Mars' ubiquitous dust, using its atomic
force microscope.

The particle -- shown at higher magnification than anything ever seen
from another world -- is a rounded particle about one micrometer, or
one millionth of a meter, across. It is a speck of the dust that
cloaks Mars. Such dust particles color the Martian sky pink, feed
storms that regularly envelop the planet and produce Mars' distinctive
red soil.

Full story:

http://www.spaceflightnow.com/mars/p...80815dust.html

Dr. Doolittle