S02 E05 Pluto

Remember Pluto? That celestial mass on the distant outskirts of our solar system with 5 moons.The one named after the shadowy Roman God of the underworld. The one we used to call the 9th planet. Turns out it was too small and lumpy to be called a planet. So, the truth we thought we knew has changed. But, that's nothing new, somebody is always coming up with some new bit of truth the challenges our dearly held ideas of the 'facts'.