Planet Earth: Deserts

SYNOPSIS

A look at deserts, which cover a third of the earth's land surface. From space they appear lifeless but a closer inspection reveals a different picture. Deserts are in fact surprisingly varied, from Mongolia's Gobi desert, where wild Bactrian camels have to eat snow in lieu of water, to the Atacama in Chile where guanacos survive by licking the dew off cactus spines.