Seattle artist and science illustrator Marlin Peterson was recently commissioned by the Washington State Artist Trust to paint a mural somewhere in the city. After searching unsuccessfully for a suitably large wall, Peterson got the idea to look for a large roof, and where would a painting on a roof be more visiable than right underneath the Seattle Space Needle. An agreement was reached with the Seattle Center Armory (formerly the Center House) and he quickly began work on two daddy long-leg spiders using a technique called trompe l’oeil that creates the illusion when seen from above that giganto arachnids are actually overtaking the building. You can see many more photos and an explanation of his process over on Peterson’s website. (via street art utopia)

Update: An earlier version of this post referred to these arthropods as spiders. While technically daddy long-legs belong to the class Arachnida, they fall into the order Opiliones, which means they aren’t spiders, they’re called harvestmen. We regret the error. (thnx, everyone)