Astrobiology is about the study of life in the universe. This cross-disciplinary field addresses many fundamental questions concerning the origin, distribution, and future of life in the universe. The NASA Astrobiology Institute (NABI) represents a partnership between NASA and a number of academic or other research organizations. It will carry out multidisciplinary research, coordinate astrobiology across a range of disciplines and organizations, develop and demonstrate modern communications technologies in support of multidisciplinary research, provide advice to and develop technology for NASA missions, train students and young researchers, and provide outreach to the general public. The NABI headquarters are co-located with the NASA Ames Research Center in Mountain View, CA, but the Institute members are geographically distributed throughout the USA. The Institute sponsors conferences, workshops, publications, visiting faculty positions, and a new postdoctoral program to facilitate communications and encourage collaborations among researchers at different institutions. The following questions illustrate a section of the breadth and depth of astrobiology: How do habitable worlds form and how do they evolve? How did living systems emerge? How can we recognize other biospheres? How have the Earth and its biosphere influenced each other over time? How do changes in the environment affect emergent ecosystems and their evolution? What is the potential for biological evolution beyond Earth? An overview of the current state of NASA Astrobiology Institute will be given.