Browse episode ratings trends for Known Universe. Simply click on the interactive rating graph to explore the best and worst of Known Universe's 17 episodes.
Best Episodes of Known Universe
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Worst Episodes of Known Universe
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Known Universe Episode Guide
The Fastest
S1 Ep1
15th Feb 2009
In the vast expanse of space, nothing matters more than speed. Whether we’re venturing out to the farthest reaches of our solar system or exploring the mysteries of time travel and wormholes, speed is the key.
The Biggest and Smallest
S1 Ep2
15th Feb 2009
From the enormous universe in which we exist to tiny atoms that make up the building blocks of everything around us, size matters when it comes to understanding the cosmos.
The Most Explosive
S1 Ep3
15th Feb 2009
Scientists believe that our universe started with a colossal explosion called the Big Bang. That powerful blast created all the matter and energy in the universe and laid the groundwork for every explosion since.
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The first episode of Known Universe aired on February 15, 2009.
The last episode of Known Universe aired on June 23, 2011.
