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From Our Partners
TED is supported by ads and partners
Could the strange orbits of small, distant objects in our solar system lead us to a big discovery? Planetary astronomer Mike Brown proposes the existence of a new, giant planet lurking in the far reaches of our solar system -- and shows us how traces of its presence might already be staring us in the face.
About the speaker
Mike Brown scans the skies searching for and intensely studying distant bodies in our solar system in the hope of gaining insight into how our planet and the planets around it came to be.
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How I Killed Pluto and Why It Had It Coming

Learn more about TED@NAS
In 2019, TED partnered with The National Academy of Sciences, The Kavli Foundation and the Simons Foundation to bring to life an exciting day of original TED Talks from within their shared knowledge networks.
About TED Institute
Every year, TED works with a group of select companies and foundations to identify internal ideators, inventors, connectors, and creators. Drawing on the same rigorous regimen that has prepared speakers for the TED main stage, TED Institute works closely with each partner, overseeing curation and providing intensive one-on-one talk development to sharpen and fine tune ideas. The culmination is an event produced, recorded, and hosted by TED, generating a growing library of valuable TED Talks that can spur innovation and transform organizations.