Geoffrey A. Landis is a science-fiction writer and a scientist. He has won the Hugo and Nebula awards for science fiction.
He is the author of the novel Mars Crossing (recently re-issued from Tor Books) and the story collection Impact Parameter
(and Other Quantum Realities), and has written over eighty published science fiction stories. As a scientist, he works for
NASA on developing advanced technologies for spaceflight. He is a member of the Mars Exploration Rovers Science team,
developed the conceptual design for the solar power system for the Parker Solar Probe mission, and is a fellow of the
NASA Institute for Advanced Concepts and a member of the advisory group for the Breakthrough Starshot project. He was
the 2014 recipient Robert A. Heinlein Award "for outstanding published works in science fiction and technical writings
that inspire the human exploration of space." In his spare time, he goes to fencing tournaments so he can stab perfect
strangers with a sword.