nat Latest articles by nat Planet X? New Evidence of an Unseen Planet at Solar System's Edge By nat published 25 May 12 An astronomer has proposed the existence of an unseen planet in the distant outskirts of the solar system. It would explain the peculiar motions of Kuiper belt objects. Planets Sign up for the Live Science daily newsletter nowGet the world’s most fascinating discoveries delivered straight to your inbox.Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1Earth's seasons vary wildly, even at the same latitude, new research finds218,000 years ago, ice age humans built dwellings out of mammoth bones in Ukraine3Tiny implant 'speaks' to the brain with LED light4Cats meow more at men to get their attention, study suggests5NASA spacecraft takes milestone 100,000th image of Mars (photo)
Planet X? New Evidence of an Unseen Planet at Solar System's Edge By nat published 25 May 12 An astronomer has proposed the existence of an unseen planet in the distant outskirts of the solar system. It would explain the peculiar motions of Kuiper belt objects.