NASA’s only visit to Uranus happened during a rare cosmic occurrence

This week, revisit what you know about Uranus, explore the far side of the moon, rediscover the famed fossil known as Lucy, and meet an otherworldly sea creature.

​ This week, revisit what you know about Uranus, explore the far side of the moon, rediscover the famed fossil known as Lucy, and meet an otherworldly sea creature. Read More Breaking News, Latest News and Videos | CNN