history anthologies as well as collections of Hugo Award winners. He has been nominated for four Hugo Awards (for two short stories and two novellas) and 12 Nebula Awards (in all categories). In addition to Timescape, he won the Nebula for the novelette "If the Stars Are Gods" (with Eklund). In 2005 the MIT SF Society awarded him the Asimov Prize. Benford was a guest of honour at Aussiecon Three, the 1999 Worldcon. He remains a regular contributor to science fiction fanzines, for example Apparatchik (defunct as of 1997). In 2016 Benford was the recipient of the Los Angeles Science Fantasy Society Forry Award Lifetime Achievement Award in the Field of Science Fiction. Contributions to science and speculative science Gregory Benford is Professor Emeritus of Physics at the University of California, Irvine. With more than 200 scientific publications, his research encompassed both theory and experiments in the fields of astrophysics and plasma physics. His research has been supported by NSF, NASA, AFOSR, DOE and other agencies. He is an ongoing advisor to NASA, DARPA (Defense Advanced Research Projects Agency) and the CIA. Benford's work in physics at the University of California focused on theoretical and experimental plasma physics, including studies of extremely strong turbulence, particularly in astrophysical contexts, and studies of magnetic structures from the Galactic Center to large-scale galactic jets. Working in collaboration with, among others, science fiction writers Cramer, Forward, and Landis, Benford worked on a theoretical study of the physics of wormholes, which pointed out that wormholes, if formed in the early universe, could still exist in the present day if they were wrapped in a negative-mass cosmic string. Such wormholes could potentially be detected by gravitational lensing. In 2004, Benford proposed that the harmful effects of global warming could be reduced by the construction of a rotating Fresnel lens 1,000 kilometres across, floating in space at the Lagrangian point L1. According to Benford, this lens would diffuse the light from the Sun and reduce the solar energy reaching the Earth by approximately 0.5% to 1%. He estimated that this would cost around US$10 billion. His plan has been commented on in a variety of forums. A similar space sunshade was proposed in 1989 by J. T. Early, and again in 1997 by Edward Teller, Lowell Wood, and Roderick Hyde. In 2006, Benford pointed out one possible danger in this approach: if this lens were built and