Why do storms spin in different directions depending on their location—and why do they spin in the first place? Play the Cloud Lab: http://www.pbs.org/wgbh/nova/labs/lab/cloud/ Find discussion questions for this video and other resources in the Cloud Lab collection on PBS LearningMedia: http://www.pbslearningmedia.org/resource/nvcl.sci.earth.coriolis/the-coriolis-effect/