Harvard physicist Avi Loeb told DailyMail.com that his new study shows fragments pulled from the Pacific Ocean are from outside of our solar system - and not coal and ash as critics have claimed.
Four billion years ago, says Steve Desch, assistant professor in the School of Earth and Space Exploration at Arizona State University, Uranus and Neptune switched places. His research work appears in this week’s Astrophysical Journal. Desch based his conclusion on his calculations of the surface density of the solar nebula.