IMAGE 0_99\75.Lbm,A full-scale model of the Viking lander that set down on Mars in 1976. In the foreground is the extendable sampling arm.
IMAGE 200_299\203.Lbm,This Viking photograph was taken as the probe neared Mars. It shows near the centre Mariner Valley; to the left clouds near a volcano, and to the right a frost-filled Argyre Basin.
IMAGE 200_299\231.Lbm,A Viking approach photograph showing at centre the three huge volcanoes on the Tharsis Ridge. To their left is the biggest volcano of all, mighty Olympus Mons.
IMAGE 900_999\954.Lbm,True and false-colour Viking picture of Mars, featuring near the centre the volcanoes on the Tharsis Ridge.
IMAGE 100_199\146.Lbm,A Viking orbiter picture of the Martian surface. It is pockmarked with craters and criss-crossed with channels, some made by lava flows but others maybe by flowing water.
IMAGE 100_199\199.Lbm,This Viking picture of the Martian surface shows what appears to be a watercourse, formed aeons ago by flooding.
IMAGE 200_299\200.Lbm,The Viking 1 orbiter snapped this picture of a "face" etched in the Martian landscape. Some have suggested that intelligent beings carved it.
IMAGE 200_299\232.Lbm,Clouds gather on the slopes of the biggest volcano in the Solar System, Olympus Mons on Mars, five times the height of Everest and 600 km across at the base. This painting is based on Viking photographs.
IMAGE 700_799\725.Lbm,In this Viking orbiter picture of Mars, mist hangs in the canyons of the region known as the Labyrinth of the Night.
IMAGE 0_99\94.Lbm,A false colour picture of Mars's giant volcano Olympus Mons, obtained by computer processing data from the Viking orbiters.
IMAGE 100_199\143.Lbm,The rust-coloured Martian surface on the plain of Chryse, photographed by the Viking 1 lander in 1976.
IMAGE 200_299\273.Lbm,A Martian sunset, captured by the Viking 1 lander on the plain of Chryse.
IMAGE 500_599\586.Lbm,The rusty coloured surface of Mars, photographed by the Viking 1 lander on the plain of Chryse. The lander's sampling scoop and arm are in the foreground.
IMAGE 900_999\915.Lbm,The surface of Mars, from Viking 1, which landed on the plain of Chryse. The landscape is rust-red and strewn with rocks.
IMAGE 1700_99\739.Lbm,A computer-generated 'fisheye' view of Mars from the Viking 1 lander.
IMAGE 200_299\274.Lbm,Steep cliffs circle the summit crater of Mar's huge volcano, Olympus Mons, which is some 65 km across. This model is based on Viking photos.
IMAGE 100_199\184.Lbm,The tiny Martian moon Phobos, from photographs taken by the Viking probes. It is probably a captured asteroid.
IMAGE 800_899\899.Lbm,The Viking 1 orbiter flew within 500 km of Mars's innermost moon Phobos to obtain the pictures for this mosaic. The moon is only about 20 km across.
IMAGE 200_299\229.Lbm,The smaller of Mars's two moons, Deimos, pictured by Viking.
