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- Newly discovered planet could destroy Earth any day now [2016]
- Mysterious planet wiped out life on Earth once and could do it again THIS MONTH [2016]
- Researcher links mass extinctions to 'Planet X' [2016]
- Scientists just found more evidence that Planet Nine exists in our Solar System [2016]
- Search Narrows For Planet Nine [2016]
- Don't Blame 'Planet Nine' for Earth's Mass Extinctions [2016]
- Researchers find evidence of a real ninth planet [2016]
- There's a ninth planet in our solar system --- we just can't see it yet, study says [2016]
- Ninth Planet May Exist in Solar System Beyond Pluto, New Evidence Suggests [2016]
- Scientists may have found Planet X, the mysterious presence that has eluded astronomers [2015]
- The Chilling Regularity of Mass Extinctions [2015]
- Is there a Planet X, a 'massive perturber,' hidden beyond Pluto? [2015]
- New Examination of Trans-Neptunian Objects Suggests Two Planets Lurk in Outer Solar System [2015]
- Astronomers are Predicting at Least Two More Large Planets in the Solar System [2015]
- Sun May Still Have Low-Mass Solar Companion, Say Astrophysicists Searching NASA WISE Mission Data [2014]
- Mystery Planet: Is a Rogue Giant Orbiting Our Sun? [2011]
- Astronomers Doubt Giant Planet 'Tyche' Exists In Our Solar System [2011]
- Largest planet in the solar system could be about to be discovered (4x Jupiter) [2011]
- Giant Stealth Planet May Explain Rain of Comets from Solar System's Edge [2010]
- Life on Earth wiped out every 27 million years (16 million years until the next one) [2010]
- Search on for Death Star that throws out deadly comets.. [2010]
- Six Mysteries of Our Solar System: Its history raises a lot of questions [2009]
- Earth-sized planet predicted beyond Pluto [2008]
- An Unknown Planet Orbits in the Outer Solar System [2007]
- Mass limit on Nemesis [2006]
- Far-out worlds, just waiting to be found [2005]
- Does the Sun Have a Doomsday Twin? [2002]