The new NASA Science Explorer (SciX) is a literature-based, open digital information system covering and unifying the fields of Astrophysics, Planetary Science, Heliophysics, and Earth Science. Built on the success of the NASA Astrophysics Data System (ADS), SciX provides significant expansion of content into earth science while leveraging the infrastructure of ADS which enables cross-linking between the published literature and preprints, data products, and software packages. We are indexing NASA's PubSpace, hundreds of Earth Science journals (including all AGU and EGU journals), preprints (including ArXiv, ESSOAR, and Earth ArXiv), meeting abstracts, theses and other gray literature; and we are continually expanding our coverage of citations and full text to improve search and discoverability. SciX is freely available and actively seeking collaborations within the earth and space science community.