The Origins of Letters from Antiquity to the Present
Distinguished Research Professor
UCLA
Survey Gaps & Rogues
Senior Research Scientist
NASA Goddard Space Flight Center
The NASA Panel's UAP Report
Professor, Electrical and Computer Engineering
Boston University
Marvin L. Goldberger Professor of Physics
Jet Propulsion Laboratory Senior Research Scientist
Caltech
Great Technical Challenges, Revolutionary Energies
Chair, Accelerator Facilities Division
Brookhaven National Laboratory
Director of Tokamak Operations
Chief Engineer for ARC Conceptual Design
Commonwealth Fusion Systems
What We’ve Found in the Asteroid Regolith So Far
Senior Scientist for Astrobiology
Project Scientist, OSIRIS-REx
NASA Goddard Space Flight Center
High-resolution, continuous, and complete daily views of the world
Founder & CEO
Planet