Scientists May Have Found 'True' Ninth Planet

January 20, 2016 - Astronomers may have discovered evidence of an unseen planet in the farthest reaches of our solar system, almost 10 years after Pluto was demoted. Michael Lemonick is a writer for Scientific American, and joins CBSN to discuss this surprising find.

FAIR USE NOTICE: This video may contain copyrighted material. Such material is made available for educational purposes only. This constitutes a 'fair use' of any such copyrighted material as provided for in Title 17 U.S.C. section 106A-117 of the U.S. Copyright Law.