By Lawrence M. Krauss, Lynn Eden, Robert Rosner, Alexander Glaser, James E. Hansen, Edward “Rocky” Kolb, Leon Lederman, Ramamurti Rajaraman, M.V. Ramana, Elizabeth J. Wilson, Richard C. J. Somerville, Sivan Kartha, Jennifer Sims, | Analysis, Biosecurity, Climate Change, Nuclear Energy, Nuclear Weapons, Special Topics, Technology and Security