The Phoenix Mars Lander, also called Phoenix, is a robotic spacecraft launched on a space exploration mission to Mars on August 7, 2007.
According to recent NASA's news it seems that the $386-million spacecraft is on course and is set for landing on May 25.

Phoenix is equipped with a robotic arm capable to dig down to half a meter below the surface to retrieve samples of ice discovered by the previous satellite.
Those ice samples are to be later examined in order to determine whether the region contains water, complex organic compounds and sources of energy that might support life.

Surface Stereo Imager, a set of two cameras working like a pair of eyes and the robotic arm camera will provide us with 3D, infrared and visible-light, images of Mars surface. Those images will have a very high resolution, which makes it possible for features as small as few millimeters to be visible.

Phoenix's instruments makes it the best candidate for uncovering information on the geological and possibly biological history of Mars.