Want more? Subscribe to NASA on iTunes! http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=283424434 Humans have always looked up at the sky. They used astronomy to track time, orient their cities, decide when to plant their crops, and even based their religious practices on their celestial world. But there was much more to learn.
Questions about NASA | We Did All That in 50 Years!
Want more info about NASA | We Did All That in 50 Years!?
Get free advice from education experts and Noodle community members.