Back to back on the Discovery Science Channel in the US. Channel varies by location. These are on tomorrow.
(60 minutes) Last Planet From Our Sun
The discovery of a massive region of rocky, icy asteroids in the outer solar system, along with at least one that is actually larger than Pluto, has caused a profound astronomical controversy. Is Pluto really a planet after all?
(60 minutes) Extreme Universe
As scientists search the universe for undiscovered planets, they uncover incandescent storms big enough to swallow Earth, lightning bolts thousands of miles long, raging infernos of toxic gas and planets larger than any known to man.
(60 minutes) Parallel Universe
The strange notion of parallel universes is gaining strength in the scientific community and may solve our most basic questions about the universe, including the origins of the Big Bang itself.