Being the dry planet it is, I usually think of Mars as a planet with hardly any ice or clouds. Of course, the Mars Phoenix Lander gave us close-up looks of the water ice at the Martian north pole. And Mars does have clouds. And they're clouds actually made up of water, not something like carbon dioxide! Phoenix also spent some time taking pictures of the Martian sky with its clouds. Before you think that this is a big discovery by Phoenix, you should know that we've known about them for decades. But the animated sequence of images is still very cool.