Southern Folk Medicine by Phyllis D. Light

“Smell can travel through space on gaseous molecules that move by diffusion across the emptiness, making it not empty anymore. Gases and physical particles can exist in a vacuum but tend to dilute across the vastness. Astronauts have reported a distinct smell of cooking meat after a spacewalk, and, reportedly, the moon has its own smell. Interesting.”

-Phyllis D. Light, 2018