None of the itsy-bitsy spidery things in the image above are tiny, nor are they on Earth. Those creepy-crawlers are surface features on Mars, which have been photographed near the south pole of the red planet for years by the HiRISE camera onboard NASA’s Mars Reconnaissance Orbiter, or MRO. The area in the picture measures about half-a-mile wide. In an attempt to learn more about these odd-looking features, planetary scientists have created a website, Planet Four: Terrains, and are looking for volunteers to assist them in finding more spider locations on Mars. function onPlayerReadyVidible(e){'undefined'!=typeof HPTrack&&HPTrack.Vid.Vidible_track(e)}!function(e,i){if(e.vdb_Player){if('object'==typeof commercial_video){var a='',o='m.fwsitesection='+commercial_video.site_and_category;if(a+=o,commercial_video['package']){var c='&m.fwkeyvalues=sponsorship%3D'+commercial_video['package'];a+=c}e.setAttribute('vdb_params',a)}i(e.vdb_Player)}else{var t=arguments.callee;setTimeout(function(){t(e,i)},0)}}(document.getElementById('vidible_1'),onPlayerReadyVidible); According to a Planet Four: Terrains statement: The exotic terrains of Mars’ south pole have many forms unlike anything on Earth.