Trivia no.77 The solar System

Mars is covered by a stony desert that contains lots of iron oxide, making it appear rusty-red. Mars has small polar ice-caps that grow larger during the Martian winter.

Tell me (Chancellor Press)
image: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTvqrnoBBohHdcSyyp8WZ1qL_lvWoKtDbKwPluR8J6vaf_9bvwyXeIP7kFP